Preparation of Iodoform. Aim : To prepare a pure sample of iodoform. Chemicals : Acetone 5 ml Iodine 5 g NaOH 5 % Methylated spirit
|
|
- Robyn Hopkins
- 6 years ago
- Views:
Transcription
1 Preparation of Iodoform Aim : To prepare a pure sample of iodoform. Chemicals : Acetone 5 ml Iodine 5 g NaOH 5 % Methylated spirit Theory : CH 3 COCH 3 + 4I 2 + 4NaOH CHI 3 + 3NaI + CH 3 COONa + 2H 2 O Procedure: Dissolve 5 g of iodine in 5 ml acetone in a conical flask. Add 5 % sodium hydroxide solution slowly with shaking until the colour of iodine is discharged. Allow contents of flask to stand for minutes. Filter the yellow precipitate of iodoform through Buchner funnel Wash the precipitate with cold water. Dry precipitate between filter paper and weigh it. Result : Yield of crystals 5 g Colour of crystals yellow Melting point 119 C. Precautions : Use freshly prepared sodium hydroxide. Add sodium hydroxide slowly and with constant stirring.
2 Preparation of 2- Naphthol Aniline or Aniline Yellow Aim : To prepare 2- Naphthol Aniline or Aniline Yellow dye. Chemicals : Aniline - 5ml Sodium nitrite 8g Dil. HCl (5N) 20 ml 2- Naphthol 8 ml NaOH - 3g Starch KI paper Theory : Procedure : Dissolve 5ml of aniline in 20 ml 0f dil.hcl in a boiling tube and cool in an ice bath. Dissolve 8 g NaNO 2 in ml of distilled water in a boiling tube and cool in ice bath. Add cooled aq. solution of NaNO 2 slowly to cooled solution of aniline. Shake after each addition. Add few pieces of ice to reaction mixture. If diazotization is complete, the solution changes starch iodide paper to blue. Dissolve 3 g of NaOH in 10 ml of water in another boiling tube. Add 8 ml of 2- Naphthol to it slowly with shaking. Cool in an ice bath. Add solution of benzene diazonium chloride to the solution of 2- Naphthol in NaOH in small quantities with shaking. Orange dye is formed. Filter it in a buchner funnel. Wash the dye with water and dry it between folds of filter paper. Weigh it. Result : Yield of crystals 7 g Colour of crystals Orange Precautions Reaction mixture should be properly cooled. ph of coupling reaction should be between 9-10.
3 Detection of Carbohydrates, Proteins and Fats in the Given Foodstuff Experiment 1 Aim : To detect the presence of carbohydrate in the given foodstuff. Molisch Test Sample + 2 drops of - napthal Reddish brown ring at junction of Carbohydrate present 2 layers Fehling s Test Sample + Fehling s solution + Yellow or red precipitate Carbohydrate present warm in water bath. Benedict s Test Sample + Benedict s solution + warm in water bath. Red precipitate Carbohydrate present Conc. H 2 SO 4 Test Sample + Conc. H 2 SO 4 Charring with burnt sugar smell. Carbohydrate present Result : The given foodstuff contains carbohydrates. Experiment 2 Aim : To detect the presence of fats / oils in the given foodstuff. Spot Test Sample placed between folds of filter paper and crushed. Appearance of translucent spot Fats or oils present Solubility Test Sample + chloroform Sample dissolves Fats or oils present Acrolein Test Sample + potassium bisulphate + heating Irritating smell due to acrolein formation Fats or oils present Result : The given foodstuff contains fats or oil
4 Experiment 3 Aim : To detect the presence of protein in the given foodstuff. xanthproteic Test Sample + few ml of conc. HNO 3 Shake and leave undisturbed. Yellow or deep yellow colour Proteins present Millon s Test Sample + few drops of mercuric nitrate+ 1 drop dil. HCl + Boil, Cool + 1drop NaNO 3 + Heat mixture Deep red colour Proteins present Biuret Test Sample + 10% NaOH + dil. CuSO 4 Violet colour Proteins present Ninhydrin Test Sample + 0.1% ninhydrin solution + boil for 1 minute Blue colour on cooling Proteins present Result : The given foodstuff contains proteins.
5 Identification of Functional Groups In Given Organic Compounds Experiment 1 Aim : To test for the presence of unsaturation in a given organic sample. Bromine Test 0.2g of sample dissolved in Disappearance of orange red or Presence of unsaturation carbon tetrachloride + 2 drops 2% bromine brown colour. Baeyer s Test Sample dissolved in acetone + few drops of 2% alkaline potassium permanganate. Decolourisation of pink colour. Presence of unsaturation Experiment 2 Aim : To test for the presence of alcoholic group in a given organic sample. Ester Test Sample + few drops of acetic acid + Pleasant smell Ester present Conc. H 2 SO 4 Warm in a water bath. Sample + small piece of Na metal Effervescence with evolution of hydrogen gas. Presence of alcoholic group Iodoform Test Sample + NaOH solution + solid I 2 + warm Yellow precipitate Presence of alcohol with methyl ketone group Experiment 3 Aim : To test for the presence of phenolic group in organic sample Litmus Test Sample + blue litmus Blue litmus turns red Presence of phenolic group FeCl 3 Test Sample + small amount of FeCl 3 Green or reddish violet precipitate Presence of phenolic group
6 Bromine Water Test Sample dissolved in water + bromine water Cerric Ammonium Nitrate Test Sample + water + heat + cerric ammonium nitrate solution. Experiment 4 White precipitate Green or brown precipitate Presence of phenolic group Presence of phenolic group Aim : To test for the presence of aldehyde group in organic sample. 2,4 Dinitrophenyl hydrazine Test 2,4 DNP + sample Yellow orange precipitate Presence of aldehyde group Schiff s Test Sample + Schiffs Reagent Pink colour Presence of aldehyde group Fehling s Test Sample + Fehling s solution + warm in water bath Tollen s Test Sample + Tollen s solution + warm in water bath Yellow or red precipitate Silver mirror on sides of test tube Presence of aldehyde group Presence of aldehyde group Experiment 5 Aim : To test for the presence of carboxylic acid group in organic sample. Litmus Test Sample + blue litmus Blue litmus turns red Presence of carboxylic acid group Sodium hydrogen carbonate Test Sample + pinch of NaHCO 3 CO 2 gas is evolved Presence of carboxylic acid group NaOH Test Sample + NaOH solution Sample is soluble Presence of carboxylic acid group FeCl 3 Test Sample + water + NH 4 OH. Boil to remove NH 3. Cool and add neutral FeCl 3 Red or Yellow precipitate Presence of carboxylic acid group
7 Preparation of Crystals of Potash Alum Aim : To prepare crystals of potash alum Chemicals Required : 2.5 g of potassium sulphate, 10g of aluminium sulphate, 2-3 ml of conc. sulphuric acid. Theory : Potash alum is double salt of potassium sulphate and aluminium sulphate with composition K 2 SO 4 Al 2 (SO 4 ) 3 24(H 2 O). It is formed by adding equimolar mixture of hydrated aluminium sulphate and potassium sulphate crystals with minimum amount of sulphuric acid. K 2 SO 4 + Al 2 (SO 4 ) 3 18(H 2 O) + 6 H 2 O K 2 SO 4 Al 2 (SO 4 ) 3 24(H 2 O). Procedure : Take 2.5 g of potassium sulphate in a 250 ml beaker and dissolve it in a minimum amount of water by stirring with a glass rod. Heat if required. Take 10 g of aluminium sulphate in another beaker. Add 3-4 drops of dilute sulphuric acid to prevent hydrolysis. Then add 20 ml of water. Heat the beaker with constant stirring. Mix both solution in a china dish and concentrate mixture to crystallization point. Octahedral colourless crystals are obtained. Remove mother liquor carefully. Dry crystals between folds of filter paper and weigh them Result : Colour of Crystals : Colourless Shape of Crystals : Octahedral Weight of Crystals :.g Precautions : Add a few drops of dilute sulphuric acid while dissolving aluminium sulphate to prevent hydrolysis. Use ice cold water to wash potash alum as it is fairly soluble in water.
8 Preparation of Lyophobic Sol Aim : To prepare a sample of ferric hydroxide sol.. Chemicals Required : 0.2 M ferric chloride solution, distilled water. Theory : Hydrolysis of ferric chloride produces ferric hydroxide which undergoes agglomeration to give particles of colloidal dimension. These particles adsorb Fe 2+ ions from the solution and acquires a positive charge which stabilizes the sol. FeCl 3 + 3H 2 O Fe(OH) 3 + 3HCl (red sol) Procedure : Pour 100 ml of distilled water in a 250 ml beaker and place it on a wire gauze for heating. Add 0.2 M ferric chloride solution drop wise with the help of dropper to the boiling water. Continue heating till a deep red or a brown solution of ferric hydroxide is obtained. Allow contents of beaker to cool. Filter to remove precipitate of ferric hydroxide and collect filtrate in a beaker. The filtrate is ferric hydroxide sol. Precautions All glass ware should be free from impurities. Add ferric chloride solution very slowly drop by drop to boiling water. Use only distilled water. Result : A sample of lyopbobic colloid of ferric hydroxide has been prepared.
9 Preparation of Lyophilic Sol Aim : To prepare a sample of starch sol. Chemicals Required : 1g starch, distilled water. Theory : Starch forms lyophilic colloidal solution directly when mixed with hot water. Starch sol is stable and electrically neutral. Procedure : Pour 100 ml of distilled water in a 250 ml beaker and place it on a wire gauze for heating. Grind 1 g of soluble starch with a few ml of distilled water in a mortar and pestle to a fine paste. Pour the paste into boiling water with the help of a glass rod. Continue boiling for 2-3 minutes after addition of starch. Allow contents of beaker to cool and filter it with the help of filter paper. The filtrate is a starch solution. Precautions All glass ware should be free from impurities. Make a thin, fine paste of starch before adding to boiling water. Use only distilled water. Stir the contents continuously. Result : A sample of lyophilic colloid of starch has been prepared.
10 ] Titration of Potassium Permanganate vs Oxalic Acid Aim : To determine the molarity of KMnO 4 by titrating it against standard solution of oxalic acid. Theory : Potassium permanganate oxidizes oxalic acid into carbon dioxide in acidic medium at a temperature around 60 C and itself gets reduced to colourless ions. 2 KMnO 4 + 3H 2 SO 4 K 2 SO 4 + 2MnSO 4 + 3H 2 O + 5[O] COOH 60 C + [O] 2CO 2 + H 2 O ] x 5 COOH 2 KMnO 4 + 3H 2 SO 4 + 5(COOH) 2 K 2 SO 4 + 2MnSO CO H 2 O Preparation of standard Solution : 250 ml of M/20 oxalic acid requires = g of oxalic acid. Indicator : KMnO 4 is self indicator End point : Colourless to pink Procedure : Rinse and fill burette with given KMnO 4 solution. Rinse the pipette with M/20 oxalic acid and pipette out 10.0 ml of it in a washed titration flask. Add half test tube of dilute H 2 SO 4 to flask, shake and heat it to around 60 C Note initial reading of burette ( upper meniscus) Now add KMnO 4 from burette till a permanent light pink colour is imparted to solution in titration flask. Note the final reading in the Burette. Repeat 4-5 times to get 3 concordant readings. Result : The molarity of KMnO 4 solution is..m Record of Readings Molarity of oxalic acid = M/20 Volume of oxalic acid = 10 ml S No. Burette Reading Volume of KMnO 4 used (ml) Initial Final 1. 2.
11 Calculations KMnO 4 = Oxalic acid a 1 x V 1 x M 1 = a 2 x V 2 x M 2 a 2 x V 2 x M 2 M 1 = a 1 x V 1 = 2 x 10 x M/20 5 X V 1 = 1/(5V 1 ) M = M
12 Titration of Potassium Permanganate vs Mohrs Salt Aim : To determine the molarity and strength of KMnO 4 by titrating it against standard solution of Mohrs Salt. Theory : Potassium permanganate oxidizes ferrous ammonium sulphate in acidic medium and itself gets reduced to colourless ions. 2 KMnO 4 + 3H 2 SO 4 K 2 SO 4 + 2MnSO 4 + 3H 2 O + 5[O] 2FeSO 4.(NH 4 ) 2 SO 4.6H 2 O + [O] Fe 2 (SO 4 ) 3 + 2(NH 4 ) 2 SO H 2 O] x 5 2 KMnO 4 + 8H 2 SO FeSO 4.(NH 4 ) 2 SO 4.6H 2 O K 2 SO 4 + 2MnSO 4 + 5Fe 2 (SO 4 ) 3 +10(NH 4 ) 2 SO H 2 O Preparation of standard Solution : 1000 ml of M/20 Mohr s salt requires = 19.6 g of oxalic acid. Indicator : KMnO 4 is self indicator End point : Colourless to pink Procedure : Rinse and fill burette with given KMnO 4 solution. Rinse the pipette with M/20 Mohr s salt solution and pipette out 20.0 ml of it in a washed titration flask. Add one test tube of dilute (4N) H 2 SO 4 to flask, shake. Note initial reading of burette ( upper meniscus) Now add KMnO 4 from burette till a permanent light pink colour is imparted to solution in titration flask. Note the final reading in the Burette. Repeat 4-5 times to get 3 concordant readings. Result : (i) The molarity of KMnO 4 solution is..m. (ii) The strength of KMnO 4 solution is g/l. Record of Readings Molarity of Mohr s salt = M/20 Volume of Mohr s salt = 10 ml
13 S No. Burette Reading Volume of KMnO 4 used (ml) Initial Final Calculations (i) KMnO 4 = Mohr s salt a 1 x V 1 x M 1 = a 2 x V 2 x M 2 a 2 x V 2 x M 2 M 1 = a 1 x V 1 = 2 x 20 x M/20 10 X V 1 = 2/(10V 1 ) M = M (ii) Strength of KMnO 4 solution = molarity x molecular mass = 2/(10V 1 ) M x 158 =.g/l.
14 Salt Analysis Nature of the salt White crystalline, dissolves in water. Original solution + NaOH + heat Gas with pungent smell of ammonia evolved. Forms dense white fumes with HCl + NH 4 Original solution + Nessler s reagent Brown precipitate NH 4 + confirmed 1. Aim: To analyse the presence of anion and cation in the given salt sample. Preliminary Test Salt + dil. H 2 SO 4 Salt + conc. H 2 SO 4 Bring a rod dipped in NH 4 OH near mouth of test tube Colourless gas with pungent smell evolved Dense white fumes are formed. Absence of CO 3 2-, S 2-, SO 3 2-, NO 2 - Cl - Confirmatory Test Water extract + silver nitrate solution Curdy white precipitate soluble in excess of NH 4 OH Cl - confirmed Result: The given salt is NH 4 Cl 2. Aim: To analyse the presence of anion and cation in the given salt sample.
15 Preliminary Test Salt + dil. H 2 SO 4 Salt + conc. H 2 SO 4 + heat + copper chips Reddish brown vapours evolve which intensify with copper chips Absence of CO 3 2-, S 2-, SO 3 2-, NO 2 - NO 3 - Confirmatory Test Water extract + ferrous sulphate + conc. H 2 SO 4 along sides of test tube Reddish brown ring is formed at junction of two layers NO 3 - confirmed Nature of the salt White crystalline, dissolves in water. + Absence of NH 4 NaOH + heat White precipitate forms Pb 2+ Dilute HCl Boil white precipitate with water Precipitate dissolves. Divide into 2 parts 1 part of solution + Yellow precipitate Pb 2+ confirmed potassium chromate 1 part of solution + potassium iodide Yellow precipitate Pb 2+ confirmed Result: The given salt is Pb(NO 3 ) 2 3. Aim: To analyse the presence of anion and cation in the given salt sample. Preliminary Test Absence of Salt + dil. H 2 SO 4 CO 2-3, S 2-, SO , NO 2 Salt + conc. H 2 SO 4 Absence of Cl -, Br -, I -, NO - 3, CH 3 COO -, White precipitate insoluble - C 2 O 4
16 Salt + BaCl 2 solution in dilute HCl. Indicated SO 4 2- Confirmatory Test Water extract + lead acetate White precipitate is formed SO 4 2- confirmed Result: The given salt is Al 2 (SO 4 ) 3 4. Aim: To analyse the presence of anion and cation in the given salt sample. Nature of the salt White crystalline, dissolves in water. NaOH + heat + Absence of NH 4 Dilute HCl Dilute HCl + H 2 S gas NH 4 Cl(s) + NH 4 OH Part 1 + NaOH Part 2 + blue litmus+ NH 4 OH dropwise Gelatinous white precipitate. Dissolve in dilute HCl and divide Into 2 parts White precipitate soluble in excess NaOH. Blue Lake (Blue precipitate floating in colourless solution) Absence of Group I Absence of Group II Al 3+ Al 3+ confirmed Al 3+ confirmed
17 Nature of the salt White crystalline, dissolves in water. NaOH + heat + Absence of NH 4 Dilute HCl Dilute HCl + H 2 S gas NH 4 Cl(s) + NH 4 OH NH 4 Cl(s) + NH 4 OH + H 2 S gas Part 1 + NaOH Part 2 + K 4 [Fe(CN) 6 ] White precipitate Dissolve precipitate in HCl. Boil off H 2 S. Divide into 2 parts White precipitate soluble in excess NaOH. White or bluish white precipitate. Absence of Group I Absence of Group II Absence of Group III Zn 2+ Zn 2+ confirmed Zn 2+ confirmed Preliminary Test Absence of Salt + dil. H 2 SO 4 CO 2-3, S 2-, SO , NO 2 Salt + conc. H 2 SO 4 Absence of Cl -, Br -, I -, NO - 3, CH 3 COO -, White precipitate insoluble - C 2 O 4 Salt + BaCl 2 solution in dilute HCl. Indicated SO 2-4 Confirmatory Test Water extract + lead acetate White precipitate is formed SO 4 2- confirmed
18 Nature of the salt White crystalline, dissolves in water. NaOH + heat + Absence of NH 4 Dilute HCl Dilute HCl + H 2 S gas NH 4 Cl(s) + NH 4 OH Absence of Group I Absence of Group II Absence of Group III Result: The given salt is ZnSO 4 5. Aim: To analyse the presence of anion and cation in the given salt sample.
19 NH 4 Cl(s) + NH 4 OH + H 2 S gas Absence of Group IV NH 4 Cl(s) + NH 4 OH + (NH 4 ) 2 CO 3 White precipitate Dissolve precipitate in acetic Group V acid and divide into 3 parts Part 1 + potassium chromate Yellow precipitate Ba 2+ confirmed Preliminary Test Absence of Salt + dil. H 2 SO 4 CO 2-3, S 2-, SO , NO 2 Salt + conc. H 2 SO 4 Bring a rod dipped in NH 4 OH near mouth of test tube Confirmatory Test Water extract + silver nitrate solution Curdy white precipitate soluble in excess of NH 4 OH Cl - confirmed Result: The given salt is BaCl 2 6. Aim: To analyse the presence of anion and cation in the given salt sample. Experiment Observation Inference Preliminary Test Salt + dil. H 2 SO 4 Salt + conc. H 2 SO 4 Absence of CO 3 2-, S 2-, SO 3 2-, NO 2 - Absence of
20 Salt + BaCl 2 solution Salt + conc. HNO 3 + heat + ammonium molybdate Canary yellow precipitate formed Cl -, Br -, I -, NO 3 -, CH 3 COO -, C 2 O 4 - Indicated Absence of SO 4 2- PO 4 3- confirmed Result: The given salt is Mg 3 (PO 4 ) 2 Nature of the salt White crystalline, dissolves in water. NaOH + heat + Absence of NH 4 Dilute HCl Dilute HCl + H 2 S gas NH 4 Cl(s) + NH 4 OH NH 4 Cl(s) + NH 4 OH + H 2 S gas NH 4 Cl(s) + NH 4 OH + (NH 4 ) 2 CO 3 NH 4 Cl(s) + NH 4 OH + (NH 4 ) 2 HPO 4 White precipitate on scratching Inner side of test tube Absence of Group I Absence of Group II Absence of Group III Absence of Group IV Absence of Group V Mg 2+ confirmed
Systematic Procedure for Inorganic Qualitative Analysis Systematic Analysis of Anion
Systematic Procedure for Inorganic Qualitative Analysis Systematic Analysis of Anion S.No Experiment Observation Inference 1 Preliminary Reactions Colourless Absence of Fe 2+, Fe 3+, Ni 2+, Co 2+. 2 Appearance
More information9.1 Qualitative Analysis
Chemistry Form 4 Page 44 Ms. R. Buttigieg Test for positive Ions (Cations) 9.1 Qualitative Analysis 1) Flame Tests Nichrome wire is dipped in concentrated hydrochloric acid, then in the salt being tested.
More informationCHEMISTRY PAPER 2 (PRACTICAL)
CHEMISTRY PAPER 2 (PRACTICAL) Question 1 [8] You are provided with two solutions as follows: C-10 is a solution prepared by dissolving 185 gms of potassium manganate (VII) KMnO 4 per litre. C-11 is a solution
More informationSet 4 Marking Scheme: Acid Bases & Salts 2010
Set 4 Marking Scheme: Acid Bases & Salts 00 ACID AND BASES PAPER : STRUCTURE (a) Neutralisation KOH + H SO 4 K SO 4 + H O Correct formulae of reactants and products Balanced equation i. H +, OH -, K +
More informationChemistry chart Std XII. Name. Class. Div. Roll No. Batch
[S.P.. CHOWGULE COLLEGE( H.S.S) MARGAO GOA] Name Class Div Roll No Batch No 1 VOLUMETRIC ANALYSIS REDOX TITRATIONS Experiment No: 1 Date: Aim:- You are provided with two solutions as follows. Container
More informationEXPERIMENTS. Testing products of combustion: Reducing Copper(III) Oxide to Copper. Page 4
APPARATUS Page 2 APPARATUS Page 3 Reducing Copper(III) Oxide to Copper EXPERIMENTS Page 4 Testing products of combustion: EXPERIMENTS Showing that oxygen and water is needed for rusting iron Page 5 Showing
More informationUNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Subsidiary Level and Advanced Level CHEMISTRY 9701/03
UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Subsidiary Level and Advanced Level CHEMISTRY 9701/03 Paper 3 Practical Test Candidates answer on the Question
More informationJUNIOR COLLEGE CHEMISTRY DEPARTMENT EXPERIMENT 14 SECOND YEAR PRACTICAL. Name: Group: Date:
JUNIOR COLLEGE CHEMISTRY DEPARTMENT EXPERIMENT 14 SECOND YEAR PRACTICAL Name: Group: Date: This practical will serve as (i) an introduction to aromatic chemistry and (ii) a revision of some of the reactions
More informationSalts Soluble Insoluble Nitrate salts - All nitrate salts - Carbonate salts - Potassium carbonate, K 2 CO. Except
Chapter 8: Salts 1. Salts - A salt is an ionic compound. - The anion part comes from the acid while the cation part comes from a base. - Example: KCl, KOH(aq) + HCl(aq) KCl(aq) + H 2 O(l) - A salt is a
More informationSPECIFICATION & TEST PROCEDURE SODIUM SALICYLATE Technical. Molecular weight : Reference : In-house
Page 1 of 8 Molecular Formula : C 7 H 5 NaO 3 CAS Registry No. : [54 21 7] Molecular weight : 160.10 Reference : In-house Other names : Benzoic acid, 2 hydroxy, mono sodium salt, Mono sodium salicylate.
More informationSuggested answers to in-text activities and unit-end exercises. Topic 16 Unit 55
Suggested answers to in-text activities and unit-end exercises In-text activities Discussion (page 117) Some possible ways for minimizing possible sources of error in the experiment: Add a slight excess
More informationISC 2015 CHEMISTRY PAPER 2 (PRACTICAL) Md. Zeeshan Akhtar
ISC 2015 CHEMISTRY PAPER 2 (PRACTICAL) Md. Zeeshan Akhtar [ CHEMISTRY PAPER 2 (PRACTICAL) Attempt all questions. Question 1 [8] You are provided with two solutions as follows: C-10 is a solution prepared
More informationPRADEEP SHARMA INSTITUTE OF COMPETITIVE STUDIES ( PICS INSTITUTE)
1 What is meant by ion? Ion is an atom with positive or negative change or charges..2 What is salt? What are its two parts? Salt is the neutralized product of acid and base. The two essential parts are
More information4.4. Revision Checklist: Chemical Changes
4.4. Revision Checklist: Chemical Changes Reactivity of metals When metals react with other substances the metal atoms form positive ions. The reactivity of a metal is related to its tendency to form positive
More informationNCERT. To identify the functional groups present in an organic compound. Alkenes decolourise the neutral/alkaline KMnO 4
U N IT -8 TESTS FOR FUNCTIONAL GROUPS IN ORGANIC COMPOUNDS EXPERIMENT 8.1 Aim To identify the functional groups present in an organic compound. I. TESTS FOR U NSATURATION Theor y Organic compounds containing
More informationAQA Chemistry A-level
AQA Chemistry A-level Required Practical 4 Carry out simple test-tube reactions to identify cations and anions + Cations: Group 2 ions, NH 4 Test for group 2 ions: sodium hydroxide -3 1. Place 10 drops
More informationISC 2016 CHEMISTRY PAPER 2 (PRACTICAL) Md. Zeeshan Akhtar
ISC 2016 CHEMISTRY PAPER 2 (PRACTICAL) Md. Zeeshan Akhtar CHEMISTRY PAPER 2 (PRACTICAL) Attempt all questions Question 1 [8] You are provided with two solutions as follows: C-10 is a solution containing
More informationCambridge International Examinations Cambridge International Advanced Subsidiary and Advanced Level
Cambridge International Examinations Cambridge International Advanced Subsidiary and Advanced Level CHEMISTRY 9701/31 Paper 3 Advanced Practical Skills 1 May/June 2014 2 hours Candidates answer on the
More informationCHEMISTRY CORE PRACTICALS
CHEMISTRY CORE PRACTICALS Science (9-1) Combined Science / Chemistry Core Practicals www.chemistryinfo.co.uk Modified 23/03/2018 (MJB) Core Practical INDEX Paper 1 Paper 2 CP1a: Topic: 2.11 Investigate
More informationQuestion Bank Ammonia
Question Bank Ammonia 1. Why nitrogenous matter produces ammonia? State a liquid source of ammonia. Ans. When nitrogenous matter (such as animal and vegetable proteins) decays in the absence of air, the
More informationMAHESH TUTORIALS I.C.S.E.
MAHESH TUTORIALS I.C.S.E. GRADE - X (2017-2018) Exam No. : MT/ICSE/SEMI PRELIM - II - SET -A 020 Periodic Table, Chemical bonding, Acid, Bases and Salts, Practical Work, Mole Concept, Electrolysis Chemistry
More informationCIE Chemistry A-Level Practicals for Papers 3 and 5
CIE Chemistry A-Level Practicals for Papers 3 and 5 Ion Identification Group 2 Ions Identification Example -3 1. Place 10 drops of 0.1 mol dm barium chloride in a clean test tube. Must be clean to ensure
More informationCHAPTER 8 SALTS. NaCl. A salt is an ionic substance produced when the hydrogen ion of the acid is replaced by metal ion or an ammonium ion.
CHAPTER 8 SALTS A salt is an ionic substance produced when the hydrogen ion of the acid is replaced by metal ion or an ammonium ion. The salt consists of two parts, cation from base and anion from acid.
More informationEdexcel GCSE Chemistry. Topic 3: Chemical changes. Acids. Notes.
Edexcel GCSE Chemistry Topic 3: Chemical changes Acids Notes 3.1 Rec that acids in solution are sources of hydrogen ions and alkalis in solution are sources of hydroxide ions Acids produce H + ions in
More informationINORGANIC CHEMISTRY (LAB MANUAL)
REDOX TITRATIONS Titrations involving oxidizing and reducing agents are termed as oxidationreduction or redox titrations. The phenomenon of oxidation and reduction plays an important role in our day-to-day
More informationusing simple distillation and paper chromatography practical to obtain a
2.11 Core practical: Investigate the composition of inks using simple distillation and paper chromatography Paper 1 & 2 Topic 1 What do you need to be able to do? Practical: Description Investigate the
More informationFORENSIC SCIENCE PAPER No.5: Forensic Chemistry and Explosives MODULE No. 38 : Explosives-Introduction
SUBJECT FORENSIC SCIENCE Paper No. and Title Module No. and Title Module Tag PAPER No. 5: Forensic Chemistry and Explosives MODULE No. 33: Analysis of Inorganic Anions and Cations of Post Blast Residues
More informationExperiment 8 - Double Displacement Reactions
Experiment 8 - Double Displacement Reactions A double displacement reaction involves two ionic compounds that are dissolved in water. In a double displacement reaction, it appears as though the ions are
More informationAcids and Alkalis. Looking at acids and alkalis. 1 hydrochloric. 2 sour. 3 bases. 4 ionize, ionization. 5 hydrogen. 6 mobile ions.
Topic 4 Acids and Alkalis Section A Fill in the blanks Unit 1 Looking at acids and alkalis 1 hydrochloric 2 sour bases 4 ionize, ionization 5 hydrogen 6 mobile ions 7 basicity 8 monobasic 9 dibasic 10
More informationCAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education
Centre Number Candidate Number Name CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education CHEMISTRY 0620/05 Paper 5 Practical Test Candidates answer on the Question
More informationCambridge International Examinations Cambridge International Advanced Subsidiary and Advanced Level
Cambridge International Examinations Cambridge International Advanced Subsidiary and Advanced Level *9763634822* CHEMISTRY 9701/36 Paper 3 Advanced Practical Skills 2 October/November 2014 2 hours Candidates
More informationUnit 3 Chemistry - Volumetric Analysis
Unit 3 Chemistry Volumetric Analysis Volumetric analysis is a quantitative chemical analysis used to determine the unknown concentration of one reactant [the analyte] by measuring the volume of another
More informationPrelab Assignmet Date, Title, Introduction. You will complete the procedures during the lab period as you plan for each test.
1 Qualitative Analysis Prelab Assignmet Date, Title, Introduction. You will complete the procedures during the lab period as you plan for each test. Introduction In this experiment you will be determining
More informationBE 2 ND SEMESTER PREACTICAL
BE 2 ND SEMESTER PREACTICAL QUANTITATIVE INORGANIC ANALYSIS Syllabus 1. Estimation of Fe 2+ by standard KMnO4 2. Estimation of Fe 3+ by standard K2Cr2O7 3. Estimation of Cu 2+ by iodometric method Experiment
More informationUNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Subsidiary Level and Advanced Level CHEMISTRY 9701/03
Centre Number Candidate Number Name UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Subsidiary Level and Advanced Level CHEMISTRY 9701/03 Paper 3 Practical
More informationSection Four Structured questions
Section Four Structured questions 1 For each of the following experiments, state ONE observable change and write a chemical equation for the reaction involved. a) Magnesium strip is added to dilute hydrochloric
More informationNaming salts. Metal Acid Salt. Sodium hydroxide reacts with Hydrochloric acid to make Sodium chloride
Naming salts A salt is any compound formed by the neutralisation of an acid by a base. The name of a salt has two parts. The first part comes from the metal, metal oxide or metal carbonate. The second
More informationPRACTICAL NUMBER 1 TESTS FOR METAL IONS IN SOLUTION
PRACTICAL NUMBER 1 TESTS FOR METAL IONS IN SOLUTION INTRODUCTION Most common metals have insoluble hydroxides. They can be precipitated from solution by the addition of either ammonia solution (often referred
More informationICSE Board Class X Chemistry Board Paper 2013 Solution SECTION I
ICSE Board Class X Chemistry Board Paper 2013 Solution SECTION I 1) i. Hydronium ii. Hydroxide iii. Salt iv. Water v. Hydrogen 2) i. C 2 H 6 gas Reaction: ii. Sulphur dioxide gas is evolved. K 2 SO 3 +
More informationEDTA forms a colourless complex with free metal ions. Metal ion (Ca 2+ or Mg 2+ ) + EDTA
Expt. No. : 01 Date : ESTIMATION OF HARDNESS OF WATER BY EDTA METHOD AIM: To determine the hardness of given water sample by EDTA method. APPARATUS: Burette, Pipette, Conical Flask, Beakers, Wash Bottle
More informationGeneral Information 1
General Information 1 1.1 CLEANING F VLUMETRIC GLASSWARE All the volumetric glassware (Burette, Pipette, Volumetric flasks etc) must be perfectly clean, free from dust and greasy impurities. Unreliable
More informationCentre Number Candidate Number Candidate Name UNIVERSITY OF CAMBRIDGE LOCAL EXAMINATIONS SYNDICATE General Certificate of Education Ordinary Level CHEMISTRY 5070/3 PAPER 3 Practical MAY/JUNE SESSION 2000
More informationFor. Name. Class. Div. Roll No. Batch No
For Name Class Div Roll No Batch No www.vijaynazare.weebly.com INORGANIC VOLUMETRIC ANALYSIS XI Science Acid-Base titration Experiment No-1 Date: Aim: You are provided with two solutions as follows Flask
More informationSection B: Some Essential Background Chemistry
Section B: Some Essential Background Chemistry Soluble and insoluble salts The importance of knowing whether a salt is soluble or insoluble in water You will remember that acids react with carbonates to
More informationFor the element X in the ionic compound MX, explain the meaning of the term oxidation state.
1. (a) By referring to electrons, explain the meaning of the term oxidising agent.... For the element X in the ionic compound MX, explain the meaning of the term oxidation state.... (c) Complete the table
More informationUNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certifi cate of Education Advanced Subsidiary Level and Advanced Level
XtremePapers.com UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certifi cate of Education Advanced Subsidiary Level and Advanced Level *7736236717* CHEMISTRY 9701/36 Advanced Practical Skills
More informationMAHESH TUTORIALS I.C.S.E.
MAHESH TUTORIALS I.C.S.E. GRADE - X (2017-2018) Exam No. : MT/ICSE/SEMI PRELIM - I-SET -A 008 Sulphuric acid, Ammonia, Analytical Chemistry, Organic Chemistry HCl, Nitric acid, Metallurgy Chemistry SCIENCE
More informationCore practical 15: Analyse organic and inorganic unknowns
Core practical 15 Teacher sheet Core practical 15: Objectives To research the tests for ions and organic compounds To successfully test unknown substances to establish their identity Safety Wear goggles.
More informationUNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Subsidiary Level and Advanced Level
UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Subsidiary Level and Advanced Level *1863307025* CHEMISTRY 9701/34 Advanced Practical Skills October/November
More informationCambridge International Examinations Cambridge International Advanced Subsidiary and Advanced Level
Cambridge nternational Examinations Cambridge nternational Advanced Subsidiary and Advanced Level CHEMSTRY 9701/32 Paper 3 Advanced Practical Skills 2 May/June 2014 2 hours Candidates answer on the Question
More informationnot to be republished NCERT YOU are already aware that a substance is analysed to establish its qualitative TITRIMETRIC ANALYSIS UNIT-6
UNIT-6 TITRIMETRIC ANALYSIS YOU are already aware that a substance is analysed to establish its qualitative and quantitative chemical composition. Thus, chemical analysis can be categorised as qualitative
More informationICSE Board Class X Chemistry Board Paper 2014 Solution SECTION I
ICSE Board Class X Chemistry Board Paper 2014 Solution SECTION I Answer 1 1) D 2) B 3) C 4) A 5) C 6) A 7) D 8) C 9) A 10) D 11) 1 12) Sodium ethoxide 13) CaO is alkaline 14) Downward displacement of air
More informationCHEMISTRY PAPER 1999
CHEMISTRY PAPER 1999 (One and a half hours) Answers to this paper must be written on the paper provided separately. You will NOT be allowed to write during the first 15 minutes. This time is to be spent
More informationUNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Subsidiary Level and Advanced Level
UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Subsidiary Level and Advanced Level *4827396477* CHEMISTRY 9701/35 Advanced Practical Skills October/November
More informationNCERT. [H O] Since water is in large excess, its concentration can be assumed to be constant and combining it with K provides a new constant K w
UNIT-5 PH AND PH CHANGE IN AQUEOUS SOLUTIONS YOU have already performed experiments on dynamic equilibrium between unionised salt and the ions produced by it on dissolving in a solvent. In this unit we
More informationCambridge International Examinations Cambridge International Advanced Subsidiary and Advanced Level
Cambridge International Examinations Cambridge International Advanced Subsidiary and Advanced Level *7333871663* CHEMISTRY 9701/35 Paper 3 Advanced Practical Skills 1 May/June 2015 2 hours Candidates answer
More informationUNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Subsidiary Level and Advanced Level
UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Subsidiary Level and Advanced Level *2331107163* CHEMISTRY 9701/32 Paper 32 Practical Test May/June 2007 2 hours
More informationdihalogenoalkane H 2, Nickel Catalyst addition/reduction HBr, HCl room temp KOH alcoholic heat under reflux Elimination
Synthetic Routes dihalogenoalkane K aqueous heat under reflux Nucleophilic substitution poly(alkene) high pressure atalyst polymerization LiAl 4 Reduction 2 (g) atalyst: onc 3 P 4 LiAl 4 Reduction alkene
More informationIdentification of ions and gases
For more awesome GSE and level resources, visit us at www.savemyexams.co.uk/ Identification Of ions nd Gases Question Paper Level Subject Exam oard Topic Sub-Topic ooklet O Level hemistry ambridge International
More informationNihal İKİZOĞLU 1. TYPE of CHEMICAL REACTIONS. Balance the following chemical equations. 1. Fe + H 2 SO 4 Fe 2 (SO 4 ) 3 + H 2
TYPE of CHEMICAL REACTIONS Balance the following chemical equations. 1. Fe + H 2 SO 4 Fe 2 (SO 4 ) 3 + H 2 2. C 2 H 6 + O 2 H 2 O + CO 2 3. KOH + H 3 PO 4 K 3 PO 4 + H 2 O 4. SnO 2 + H 2 Sn + H 2 O 5.
More informationUnit 5 Part 2 Acids, Bases and Salts Titrations, Indicators and the ph Scale UNIT 5 ACIDS, BASES AND SALTS
UNIT 5 ACIDS, BASES AND SALTS PART 2 TITRATIONS, INDICATORS AND THE PH SCALE Contents 1. The ph scale 2. Indicators 3. Acid-Base Titrations Key words: acidic, alkaline, neutral, ph, indicator, litmus,
More informationYear 10 Chemistry. Practice questions. Topics
Year 10 Chemistry Practice questions Topics 1 Group 1 2 Group 7 3 Reactivity series 4 Air and Water 5 Rates of reaction 6 Electrolysis 7 Acids, Alkali and Salts Objective: Evaluate group 1 & 7 reactivity
More informationUNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Subsidiary Level and Advanced Level
UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Subsidiary Level and Advanced Level *5947007489* CHEMISTRY 9701/31 Paper 31 Advanced Practical Skills May/June
More informationPaper Reference. Wednesday 18 January 2006 Morning Time: 1 hour
Centre No. Candidate No. Paper Reference(s) 643/0 Edexcel GCE Chemistry Advanced Subsidiary Unit Test 3B Wednesday 18 January 006 Morning Time: 1 hour Materials required for examination Nil Paper Reference
More informationUNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Subsidiary Level and Advanced Level *7382672438* CHEMISTRY 9701/33 Advanced Practical Skills October/November
More information4.4. Revision Checklist: Chemical Changes
4.4. Revision Checklist: Chemical Changes Reactivity of metals When metals react with other substances the metal atoms form positive ions. The reactivity of a metal is related to its tendency to form positive
More informationUNIT 6 REDOX REACTIONS Answers
UNIT 6 REDOX REACTIONS Answers Lesson 1 What is oxidation, what is reduction and what are oxidation numbers? Thinkabout Activity 1.1: What is oxidation and what is reduction? 2Mg + O 2 2MgO Mg loses its
More informationUNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Subsidiary Level and Advanced Level
UNVERSTY OF CAMBRDGE NTERNATONAL EXAMNATONS General Certificate of Education Advanced Subsidiary Level and Advanced Level *7779336909* CHEMSTRY 9701/35 Advanced Practical Skills May/June 2011 2 hours Candidates
More informationVIVA NOTES. Ans. Salt is the neutralized product of acid and base. The two essential parts are acidic radical (Anion) and Basic radical (cation).
VIVA NOTES Qs.1 What is salt? What are its two parts? Salt is the neutralized product of acid and base. The two essential parts are acidic radical (Anion) and Basic radical (cation). Qs.2 Qs.3 What is
More informationEXPT. 8 IODOMETRIC DETERMINATION OF AVAILABLE CHLORINE IN A SAMPLE OF BLEACHING POWDER
EXPT. 8 IODOMETRIC DETERMINATION OF AVAILABLE CHLORINE IN A SAMPLE OF BLEACHING POWDER Structure 8.1 Introduction Objectives 8. Principle 8.3 Requirements 8.4 Solutions Provided 8.5 Procedure 8.6 Observations
More informationINORGANIC CHEMISTRY (LAB MANUAL)
REDOX TITRATIONS Titrations involving oxidizing and reducing agents are termed as oxidationreduction or redox titrations. The phenomenon of oxidation and reduction plays an important role in our day-to-day
More informationUNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certifi cate of Education Advanced Subsidiary Level and Advanced Level
*0014911874* UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certifi cate of Education Advanced Subsidiary Level and Advanced Level CHEMISTRY 9701/33 Advanced Practical Skills 1 May/June 2012
More information27th INTERNATIONAL CHEMISTRY OLYMPIAD PRACTICAL EXAMINATION FRIDAY, JULY 14,1995
FINAL REPORT 27 th IChO July 12-17 Beijing CHINA 5 27th INTERNATIONAL CHEMISTRY OLYMPIAD PRACTICAL EXAMINATION FRIDAY, JULY 14,1995 Please read the entire procedure and the Student's Report before beginning
More informationChapter 7 Solution Chemistry. 7.1 The Nature of Solutions. Warm Up (p. 364) and Quick Check (p. 365)
Chapter 7 Solution Chemistry 7.1 The Nature of Solutions Warm Up (p. 364) and Quick Check (p. 365) Car exhaust Tap water Carbon dioxide Freshly squeezed orange juice Stainless steel Tea Diamond Cigarette
More informationLaboratory 23: Properties of Aldehydes and Ketones
Introduction Laboratory 23: Properties of Aldehydes and Ketones Aldehydes and Ketones represent an important class of organic molecules containing a carbonyl carbon. In this experiment you will study the
More information2. An aldehyde can be obtained by the dehydrogenation of an alcohol. The catalyst used in the reaction is
Class: 12 Subject: Chemistry Topic: Organic Chemistry of O compounds No. of Questions: 20 Duration: 60 Min Maximum Marks: 60 1. Rectified spirit is converted to absolute alcohol taking advantage of the
More informationDharmapuri LAB MANUAL. Regulation : 2013 Branch. : B.E. All Branches GE6163-CHEMISTRY LABORATORY - I E NG
Dharmapuri 636 703 LAB MANUAL Regulation : 2013 Branch Year & Semester : B.E. All Branches : I Year / I Semester GE6163-CHEMISTRY LABORATORY - I E NG ANNA UNIVERSITY: CHENNAI SYLLABUS R 2013 GE6163 - CHEMISTRY
More informationLab #14: Qualitative Analysis of Cations and Anions
Lab #14: Qualitative Analysis of Cations and Anions Objectives: 1. To understand the rationale and the procedure behind the separation for various cations and anions. 2. To perform qualitative analysis
More informationCambridge International Examinations Cambridge International Advanced Subsidiary and Advanced Level
*3682053586* Cambridge International Examinations Cambridge International Advanced Subsidiary and Advanced Level CHEMISTRY 9701/31 Paper 3 Advanced Practical Skills 1 May/June 2015 Candidates answer on
More informationAdvanced Unit 7: Chemistry Practical Examination (SET A) Candidates must have: Scientific calculator Ruler
Write your name here Surname Other names Pearson Edexcel International Advanced Level Centre Number Candidate Number Chemistry Advanced Unit 7: Chemistry Practical Examination (SET A) Monday 8 May 2017
More informationIdentification of Ions and Gases
Identification of Ions and Gases Question Paper 1 Level IGSE Subject hemistry (0620/0971) Exam oard ambridge International Examinations (IE) Topic cids, bases and salts Sub-Topic Identification of ions
More information*8733689660* www.onlineexamhelp.com Cambridge International Examinations Cambridge International Advanced Subsidiary and Advanced Level CHEMISTRY 9701/35 Paper 3 Advanced Practical Skills 1 October/November
More informationGE 6163 CHEMISTRY LAB MANUAL
VALLIAMMAI ENGINEERING COLLEGE S.R.M NAGAR, KATTANKULATHUR 603 203 Department of Chemistry (2015-2016) GE 6163 CHEMISTRY LAB MANUAL Step I : Standardization of sodium thiosulphate Titration I (Standard
More informationEXPERIMENT 7 Precipitation and Complex Formation
EXPERIMENT 7 Precipitation and Complex Formation Introduction Precipitation is the formation of a solid in a solution as the result of either a chemical reaction, or supersaturating a solution with a salt
More informationScientific Observations and Reaction Stoichiometry: The Qualitative Analysis and Chemical Reactivity of Five White Powders
Scientific Observations and Reaction Stoichiometry: The Qualitative Analysis and Chemical Reactivity of Five White Powders Objectives Part 1: To determine the limiting reagent and percent yield of CuCO
More informationAcyl chloride/ acid anhydride
3.14 Synthetic routes poly(alkene) dihalogenoalkane KH aqueous under reflux Nu Sub diol high pressure catalyst Step 1 H 2 S 4 EAdd Step 2 H 2 warm hydrolysis alcohol alkene conc. H 2 S 4 or conc. H 3 P
More informationVolumetric Analysis: Redox
Name: Volumetric Analysis Objectives 3. Volumetric Analysis carry out a potassium manganate(vii)/ammonium iron(ii) sulfate titration determine the amount of iron in an iron tablet carry out an iodine/thiosulfate
More informationDirected by Ph. Sadeel Shanshal
University of Mosul College of Pharmacy Practical Laboratory Dept. of Pharmaceutical Chemistry Head of dept. Dr. ؤىوىست Nohad Al.Omari Directed by Ph. Sadeel Shanshal 0 Syllabus : No. Lab. Title Hours
More informationQuestion 1: Solution 1:
Book Name: Selina Concise Question 1: Comment, sulphuric acid is referred to as: (a) King of chemicals (b) Oil of vitriol Solution 1: (a) Sulphuric acid is called King of Chemicals because there is no
More informationScholarship 2015 Chemistry
93102 931020 S SUPERVISOR S Scholarship 2015 Chemistry 9.30 a.m. Friday 27 November 2015 Time allowed: Three hours Total marks: 32 Check that the National Student Number (NSN) on your admission slip is
More informationCambridge International Examinations Cambridge International Advanced Subsidiary and Advanced Level
Cambridge International Examinations Cambridge International Advanced Subsidiary and Advanced Level *4147278659* CHEMISTRY 9701/34 Paper 3 Advanced Practical Skills 2 May/June 2015 2 hours Candidates answer
More informationCHEMICAL REACTIONS & EQUATIONS
CHEMICAL REACTIONS & EQUATIONS PHYSICAL AND CHEMICAL CHANGE In our daily life many processes occur around us. Some of them do not lead to formation of any new substance, while others may lead to formation
More informationJUNIOR COLLEGE CHEMISTRY DEPARTMENT EXPERIMENT 22 SECOND YEAR PRACTICAL. Name: Group: Date: Cr 3+ (aq)+ 3 OH (aq) Cr(OH) 3(s)
JUNIOR COLLEGE CHEMISTRY DEPARTMENT EXPERIMENT 22 SECOND YEAR PRACTICAL Name: Group: Date: THE CHEMISTRY OF CHROMIUM AND MANGANESE CHROMIUM 1. To a solution of Cr 3+ ions add aqueous sodium hydroxide until
More informationExperiment VI.4 - Complete Analyse
Experiment VI.4 - Complete Analyse The Ions found I the unknown substance were: NH 4 +, K +, Sr 2+, Cu 2+ ;B(OH) 4 -, Br -, Cl -, CrO 4. The testing process is described below. Cation analyse In a first
More informationSOLUBILITY REVIEW QUESTIONS
Solubility Problem Set 1 SOLUBILITY REVIEW QUESTIONS 1. What is the solubility of calcium sulphate in M, g/l, and g/100 ml? 2. What is the solubility of silver chromate? In a saturated solution of silver
More informationCHAPTER No. 1 CHEMICAL REACTIONS AND EQUATIONS HOTS: (High Order Thinking Skill) Questions with Answers: 1 A compound `X` is used for drinking, has ph =7.Its acidified solution undergoes decomposition
More informationQualitative Analysis Part Two Anions & Gases
Qualitative Analysis Part Two Anions & Gases Qualitative Tests for Anions Which anions must I know the tests for? Describe tests to identify the following anions: Carbonate CO 3 2 (by the addition of dilute
More information5070/04. UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level CHEMISTRY Paper 4 Alternative to Practical
UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level CHEMISTRY Paper 4 Alternative to Practical 5070/04 May/June 2005 Candidates answer on the Question Paper.
More informationScience NCERT Exemplar Solutions Chapter 1: Chemical Reactions and Equations
Science NCERT Exemplar Solutions Chapter 1: Chemical Reactions and Equations Multiple Choice Questions (MCQs) Q. 1 Which of the following is not a physical change? (a) Boiling of water to give water vapour
More informationflame test acidified silver nitrate solution added
1 The results of two tests on solid X are shown. test aqueous sodium hydroxide added acidified silver nitrate added observation green precipitate formed yellow precipitate formed What is X? copper(ii)
More information