Analytická chémia I. Analytické meranie. Princípy analytických meraní 2/13/2018
|
|
- Reginald Briggs
- 5 years ago
- Views:
Transcription
1 Analytická chémia I 2017/2018 prof. Ing. Ivan Špánik, DrSc. Ústav Analytickej chémie miestnosťč. 490, 566, 379 Klapka ivan.spanik@stuba.sk Analytické meranie Signál Dekódovanie Vzorka Informácia Princípy analytických meraní Fyzikálne 1
2 Princípy analytických meraní Fyzikálne Princípy analytických meraní Chemické Princípy analytických meraní Biochemické 2
3 Princípy analytických meraní Biologické Princípy analytických meraní Senzorické Absolútne (nezávislé) Analytické metódy Vzorka y = f(c,x) Signál y Informácia x = základná fyzikálna veličina Relatívne (závislé) Vzorka y = f(c,k) Signál y Informácia k = konštanta získaná experimentálne 3
4 Qualitative analysis Analysis in which substances are identified or classified on the basis of their chemical or physical properties, such as chemical reactivity, solubility, molecular weight, melting point, radiative properties, mass spectra, nuclear half-life etc. Analýza, pri ktorej sú zlúčeniny identifikované alebo klasifikované na základe ich fyzikálno-chemických vlastností, ako napr. chemická reaktivita, rozpustnosť, molekulová hmotnosť, bod topenia, spektrálne údaje, hmotnostné spektrá, rádioaktívny polčas rozpadu a pod. IUPAC Compendium on Chemical Terminology 2nd edition 1997 Chemické metódy Inštrumentálne metódy Nechemické metódy Skúmadlo Analytický signál Vzorka + Reagent Charakteristická reakcia (produkt) Acidobázická Komplexotvorná Oxidačnoredukčná Zrážacia Dôkaz konštatovanie prítomnosti látky v analyzovanej vzorke 4
5 Dôkaz Identifikácia Špeciácia Analytické reakcie: Skupinové Selektívne Špecifické Medza postrehu, hranica dokázateľnosti, detekčný limit Minimálna koncentrácia (hmotnosť) prítomnej vo vzorke, ktorá poskytne pri príslušnom postupe merateľný analytický signál Medzné (hraničné) zriedenie Maximálne prípustné zriedenie analytu, pri ktorom je signál dôkazovej reakcie ešte pozorovateľný Odber vzorky Prevedenie do roztoku/predbežné skúšky Dôkaz katiónov Dôkaz aniónov Overenie Protokol 5
6 H 2 O 1 M HCl 5 M HCl 1 M HNO 3 5 M HNO 3 Cr 3+ Cr2+ Va 2+ Va 3+ Va 4+ Va 5+ Plameňové skúšky Cu 2+ Li + Na + Sr 2+ K + 6
7 Perličkové skúšky Oxidačnýplameň Redukčný plameň Prvok Horúci studený Horúci studený Bezfarebná Bezfarebná Si, Al, Sn Bezfarebná Bezfarebná Bezfarebná Bezfarebná Ca, SrBaMg Be Zn Y La Bezfarebná Bezfarebná ThZrTa and Nb Slabožltá Bezfarebná, biela Pb, Sb, and Cd Slabožltá Bezfarebná Slabožltá Bezfarebná, biela Bi Sivá Sivá Slabožltá Bezfarebná, biela Mo Hnedá Hnedá Slabožltá Bezfarebná, biela W Žltá Žltohnedá Slabožltá Bezfarebná, biela Ti Sivá Silno Fialová Slabožltá Bezfarebná, biela Fe a U Svetlozelená Bezfarebná Žltá Slabožltá Ce Bezfarebná Bezfarebná Žltá Žltozelená Cr Zelená Zelená Žltá Žltozelená V Kaki zelená Zelená Silnožltá, oranžová Žltá Ce Bezfarebná Bezfarebná Silnožltá, oranžová Žltá U Svetlozelená Svetlozelená Silnožltá, oranžová Žltá Fe Bottle Green Zelená Silnožltá, oranžová Žltozelená Cr Zelená Zelená Zelená Modrá Cu Bezfarebná, zelená Červená Modrá Modrá Co Modrá Modrá Fialová Silnočervená Ni Sivá Sivá Fialová Červenofialová Mn Bezfarebná Bezfarebná Svetloružová Svetloružová Nd Svetloružová Svetloružová 7
8 Skupinové reakcie katiónov 0.1 mol l -1 HCl Ag +, Pb 2+,Hg 2 2+,SiO % H 2 SO 4 Ca 2+, Ba 2+, Sr 2+, Pb 2+ 1mol l -1 H 2 C 2 O 4 Ca 2+ Sr 2+ Cu 2+ Hg mol l -1 NaOH Al 3+, Zn 2+, Pb 2+,Sn 2+,Sb 3+, Cr 3+ Ag +, Pb 2+,Cu 2+, Fe 3+, Ni 2+, Co 2+,Bi 3+, Mn 2+, Cd 2+ Skupinové reakcie katiónov 0.1 mol l -1 NH 3 Ag +, Hg 2 2+,Cu 2+,Cd 2+, Zn 2+, Ni 2+,Co 2+, Cr 3+ Skupinové reakcie katiónov 2mol l -1 Na 2 CO mol l -1 HPO 2-4 Okremalkalickýchkovov, As 3+ a NH mol l -1 KI I a II skupinaokremcd 2+ 8
9 Skupinové reakcie katiónov Sulfánový spôsob delenia katiónov Vzorka + zriedená HCl I. skupina (Ag+, Hg+, Pb2+, Tl+) roztok + H 2 S v kyslom prostredí roztok + H 2 S v zásaditom prostredí (NH 3 ) II. skupina (Cu2+, Hg2+, Cd 2+, Bi3+ Sb3a 5+ Sn2 a 4+ As 3 a 5+) III. skupina (Fe3+, Cr 3+, Al3+, Mn2+ Zn2+ Co 2+ Ni 2+) roztok + (NH 4 ) 2 CO 3 v kyslom prostredí IV. skupina (Ba2+, Sr2+, Ca 2+) Roztok V skupina (Mg2+, Na+, K+. Li+) I. skupina (AgCl, Hg 2Cl 2, PbCl 2, TlCl + horúca voda Roztok Pb 2+ AgCl, Hg 2 Cl 2 + NH 4 OH Roztok Ag[(NH 3) 2] Čierny Hg+ HgNH 2Cl 9
10 II. skupina (CuS, HgSCdS, Bi 2S 3 Sb 2S 5 As 2S 5SnS 2) + (NH 4 ) 2 S x IIA skupina CuS, HgS, CdS, Bi 2 S 3 Roztok IIB skupina SbS 4 3- SnS 3 2- AsS HNO 3 (1:1) HgS Roztok Cu 2+, Cd 2+, Bi % NH 3 Roztok Cu[(NH 3) 4] 2+, Cd[(NH 3) 4] 2+ modrý bezf. BiO(OH) čierny Roztok IIB skupina SbS 4 3- SnS 3 2- AsS H 2 SO 4 (1:1) Filtrát- vyliať Sb 2 S 5 As 2 S 5 SnS 2 + HClkonc. Roztok [SbCl 4 ] -,[SnCl 6 ] 2- As 2S 5 (NH 4 ) 2 HPO 4 Sb Roztok Sn 2+ IIIskupina FeS, Cr(OH) 3, Al(OH) 3, MnS ZnS, CoS NiS + 5% HCl CoS, NiS Roztok Fe 3+, Mn 2+, Zn 2+, Al 3+, Cr %NaOH+ 10%H 2 O 2 Roztok [Al(OH) 4 ] -, [Zn(OH) 3 ] -, CrO 4 2- MnO. H 2 O, Fe(OH) 3 10
11 IVskupina BaCO 3 SrCO 3, CaCO 3 + CH 3 COOH (rozpustiť) + CH 3 COONa a K 2 CrO 4 BaCrO 4 Roztok Ca 2+ Sr 2+ + NH 3, (NH 4 ) 2 CO 3 CaCO 3, SrCO 3 Filtrát vyliať + rozpustiť v HCl, K 2 SO 4 SrSO 4 Roztok Ca 2+ Pb 2+ Mn 2+ Skupinové reakcie aniónov Delenie aniónov podľa Bunsena 11
12 Vzorka + 5% HNO 3 CO 3 2-, ClO -,SO 3 2-, S 2-, S 2 O 3 2-, SiO 3 2- Roztok aniónov + Ba(NO3)2 Roztok aniónov SO 4 2-, HPO 4 2-, BO 2 -,F - + AgNO3 Cl -, Br -, I -, CN -, SCN -, [Fe(CN)6] 3,4- Roztok NO 3-, NO 2-, CH 3 COO -, ClO 4 - AgCl AgBr AgI chrómany Dôkazové reakcie: A kvapkový dôkaz na sklenej platni pre objem vzorky 0,03 ml B kvapkový dôkaz na papieri pre objem vzorky 0,03 ml C dôkaz na mikroskúmavke pre objem vzorky 0,10 ml D dôkaz na makroskúmavke pre objem vzorky 5 ml M reakcie v zornom poli mikroskopu 0,10 ml V iný spôsob (musí byť popísaný) 12
13 Moderné metódy Katióny : Emisná spektrometria, senzory Anióny: Iónová chromatografia, elektrochémia, senzory Využitie Využitie 13
14 Využitie 14
CHEM 12 Unit 3 Review package (solubility)
CHEM 12 Unit 3 Review package (solubility) 1. Which of the following combinations would form an ionic solid? A. Metalloid - metal B. Metal non-metal C. Metalloid metalloid D. Non-metal non-metal 2. Which
More informationUNIT III: SOLUBILITY EQUILIBRIUM YEAR END REVIEW (Chemistry 12)
I. Multiple Choice UNIT III: SOLUBILITY EQUILIBRIUM YEAR END REVIEW (Chemistry 12) 1) Which one of the following would form an ionic solution when dissolved in water? A. I 2 C. Ca(NO 3 ) 2 B. CH 3 OH D.
More informationChapter 18. Solubility and Complex- Ionic Equilibria
Chapter 18 Solubility and Complex- Ionic Equilibria 1 The common ion effect Le Chatelier Why is AgCl less soluble in sea water than in fresh water? AgCl(s) Ag + + Cl Seawater contains NaCl 2 Problem: The
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 informationQualitative Chemical Analysis
Qualitative Chemical Analysis István Szalai Institute of Chemistry, Eötvös University 2018 István Szalai (Institute of Chemistry, Eötvös University) Qualitative Chemical Analysis 2018 1 / 1 Topics Acid-base
More information... - " " ..,.., , -
" " 1011 1 010 1011 010 65 1 1011 4 1 5 8 3 8 4 1 5 16 6 19 7 4 8 3 9 35 10 39 11 44 58 59 60 ( ) 60 = 98 K61 63 64 3 10 11 " 40" 10 11 " " " " 4 CuSO 4 CuSO 4( ) Cu + ( ) + SO 4 ( ) ( ) CuSO 4 5H O (
More informationPractice Final CH142, Spring 2012
Practice Final CH142, Spring 2012 First here are a group of practice problems on Latimer Diagrams: 1. The Latimer diagram for nitrogen oxides in given below. Is NO stable with respect to disproportionation
More informationE5 Lewis Acids and Bases: lab 2. Session two lab Parts 2B, 3, and 4. Session one lab Parts 1and 2A. Aquo Complex Ions
E5 Lewis Acids and Bases: lab 2 Session one lab Parts 1and 2A Session two lab Parts 2B, 3, and 4 Part 2B. Complexation, Structure and Periodicity Compare the reactivity of aquo complex ions containing
More informationE5 Lewis Acids and Bases: lab 2. Session two lab Parts 2B, 3, and 4. Session one lab Parts 1and 2A. Aquo Complex Ions. Aquo Complex Ion Reactions
E5 Lewis Acids and Bases: lab 2 Session one lab Parts 1and 2A Part 2B. Complexation, Structure and Periodicity Compare the reactivity of aquo complex ions containing pre-transition, transition, and post-transition
More informationSaturated vs. Unsaturated
Solubility Equilibria in Aqueous Systems K sp (Equilibria of Slightly Soluble Salts, Ionic Compounds) Factors that Affect Solubility (Common Ion Effect, AcidBase Chemistry) Applications of Ionic Equilibria
More informationCircle the letters only. NO ANSWERS in the Columns! (3 points each)
Chemistry 1304.001 Name (please print) Exam 4 (100 points) April 12, 2017 On my honor, I have neither given nor received unauthorized aid on this exam. Signed Date Circle the letters only. NO ANSWERS in
More informationTopic: Units of Solubility Product Constant 1. The units of the solubility product of Cu 2. are : a) M 2 b) M 5 c) M d) M 3 ) 4
PHYSICAL CHEMISTRY by: SHAILENDRA KR. Classes at: - Meq. Approach SCIENCE TUTORIALS; Opp. Khuda Baksh Library, Ashok Rajpath, Patna PIN POINT STUDY CIRCLE; House No. 5A/65, Opp. Mahual Kothi, Alpana Market,
More informationWeek 9 Solubility & Intro electrochem
Week 9 Solubility & Intro electrochem Q UEST IO N 1 2 The solubility of Ag 2CO 3 is 3.5 10 g/l at 25 C. What is the value of Ks p at this temperature? 12 A. 2.2 10 8 B. 3.4 10 12 C. 8.2 10 4 D. 1.7 10
More informationAqueous Equilibria, Part 2 AP Chemistry Lecture Outline
Aqueous Equilibria, Part 2 AP Chemistry Lecture Outline Name: The Common-Ion Effect Suppose we have a weak acid and a soluble salt of that acid. CH 3 COOH NaCH 3 COO CH 3 COOH CH 3 COO + H + Since NaCH
More informationHomework #3 Chapter 4 Types of Chemical Reactions and Solution Stoichiometry
Homework #3 Chapter 4 Types of Chemical Reactions and Solution Stoichiometry 13. Determine the concentrations of the solutions Solution A 4 particles 1.0 L Solution B 6 paticles 4.0 L Solution C 4 particles
More informationFaculty of Natural and Agricultural Sciences Chemistry Department. Semester Test 1. Analytical Chemistry CMY 283. Time: 120 min Marks: 100 Pages: 6
Faculty of Natural and Agricultural Sciences Chemistry Department Semester Test 1 Analytical Chemistry CMY 283 Date: 5 September 2016 Lecturers : Prof P Forbes, Dr Laurens, Mr SA Nsibande Time: 120 min
More informationChapter 4: 11, 15, 18, 20, 22, 24, 30, 33, 36, 40, 42, 43, 46, 48, 50, 56, 60, 62, 64, 75, 82, 94 + C 2 H 3 O 2
Chapter : 11, 15, 18, 0,,, 0,, 6, 0,,, 6, 8, 50, 56, 60, 6, 6, 5, 8, 9 11. a. NaBr Na Br b. MgCl Mg Cl c. Al(NO ) Al NO d. (NH ) SO NH SO e. NaOH Na OH f. FeSO Fe SO g. KMnO K MnO h. HClO H ClO i. NH C
More information8. Relax and do well.
CHEM 1225 Exam I John I. Gelder February 4, 1999 Name KEY TA's Name Lab Section Please sign your name below to give permission to post your course scores on homework, laboratories and exams. If you do
More informationChem 12 Practice Solubility Test
Chem 12 Practice Solubility Test 1. Which combination of factors will affect the rate of the following reaction? Zn (s) + 2HCl ZnCl 2 + H 2(g) A. Temperature and surface area only B. Temperature and concentration
More informationPractice Worksheet - Answer Key. Solubility #1 (KEY)
Practice Worksheet - Answer Key Solubility #1 (KEY) 1 Indicate whether the following compounds are ionic or covalent a) NaCl ionic f) Sr(OH) 2 ionic b) CaBr 2 ionic g) MgCO 3 ionic c) SO 2 covalent h)
More informationAMOUNT OF SUBSTANCE. TASK 1 Writing formulas of ionic compounds. TASK 2 Writing formulas 1. TASK 3 Writing formulas 2
AMOUNT OF SUBSTANCE TASK 1 Writing formulas of ionic compounds 1 AgBr 2 Na 2CO 3 3 K 2O 4 Fe 2O 3 5 CrCl 3 6 Ca(OH) 2 7 Al(NO 3) 3 8 Na 2SO 4 9 PbO 10 Na 3PO 4 11 Zn(HCO 3) 2 12 (NH 4) 2SO 4 13 Ga(OH)
More informationWeek 9 Solubility & Redox
Week 9 Solubility & Redox Q UEST IO N 1 2 The solubility of Ag 2CO 3 is 3.5 10 g/l at 25 C. What is the value of Ks p at this temperature? 12 A. 2.2 10 8 B. 3.4 10 12 C. 8.2 10 4 D. 1.7 10 E. 4.3 10 Q
More informationChapter 19. Solubility and Simultaneous Equilibria p
Chapter 19 Solubility and Simultaneous Equilibria p. 832 857 Solubility Product ) The product of molar concentrations of the constituent ions, each raised ot the power of its stoichiometric coefficients
More informationSolubility Multiple Choice. January Which of the following units could be used to describe solubility? A. g/s B. g/l C. M/L D.
Solubility Multiple Choice January 1999 14. Which of the following units could be used to describe solubility? A. g/s B. g/l C. M/L D. mol/s 15. Consider the following anions: When 10.0mL of 0.20M Pb(NO3)
More informationFaculty of Natural and Agricultural Sciences Chemistry Department. Semester Test 1 MEMO. Analytical Chemistry CMY 283
Faculty of Natural and Agricultural Sciences Chemistry Department Semester Test 1 MEMO Analytical Chemistry CMY 283 Date: 5 September 2016 Lecturers : Prof P Forbes, Dr Laurens, Mr SA Nsibande Time: 90
More informationModified Dr. Cheng-Yu Lai
Ch16 Aqueous Ionic Equilibrium Solubility and Complex Ion Equilibria Lead (II) iodide precipitates when potassium iodide is mixed with lead (II) nitrate Modified Dr. Cheng-Yu Lai Solubility-product constant
More informationFall 2011 CHEM Test 4, Form A
Fall 2011 CHEM 1110.40413 Test 4, Form A Part I. Multiple Choice: Clearly circle the best answer. (60 pts) Name: 1. The common constituent in all acid solutions is A) H 2 SO 4 B) H 2 C) H + D) OH 2. Which
More informationINSTRUCTIONS: Exam III. November 10, 1999 Lab Section
CHEM 1215 Exam III John III. Gelder November 10, 1999 Name TA's Name Lab Section INSTRUCTIONS: 1. This examination consists of a total of 7 different pages. The last page includes a periodic table and
More information1. Which one of the following would form an ionic solution when dissolved in water? A. I2 C. Ca(NO3)2 B. CH3OH D. C12H22O11
Chemistry 12 Solubility Equilibrium Review Package Name: Date: Block: I. Multiple Choice 1. Which one of the following would form an ionic solution when dissolved in water? A. I2 C. Ca(NO3)2 B. CH3OH D.
More informationTASK 1 Writing formulas of ionic compounds. TASK 2 Writing formulas 1. TASK 3 Writing formulas 2. TASK 4 Writing balanced equations 1
TASK 1 Writing formulas of ionic compounds 1 AgBr 2 Na 2CO 3 3 K 2O 4 Fe 2O 3 5 CrCl 3 6 Ca(OH) 2 7 Al(NO 3) 3 8 Na 2SO 4 9 PbO 10 Na 3PO 4 11 Zn(HCO 3) 2 12 (NH 4) 2SO 4 13 Ga(OH) 3 14 SrSe 15 RaSO 4
More informationChapter 4: 11, 16, 18, 20, 22, 24, 30, 34, 36, 40, 42, 44, 46, 48, 50, 56, 60, 62, 64, 76, 82, 94 + C 2 H 3 O 2
Chapter : 11, 16, 18, 0,,, 0,, 6, 0,,, 6, 8, 50, 56, 60, 6, 6, 76, 8, 9 11. a. NaBr Na Br b. MgCl Mg Cl c. Al(NO ) Al NO d. (NH ) SO NH SO e. HI H I f. FeSO Fe SO g. KMnO K MnO h. HClO H ClO i. NH C H
More informationDirections: Use the rules for Assigning Oxidation numbers to determine the oxidation number assigned to each element in each of the given formulas.
Oxidation Numbers #00 Directions: Use the rules for Assigning Oxidation numbers to determine the oxidation number assigned to each element in each of the given formulas. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10.
More informationA reaction in which a solid forms is called a precipitation reaction. Solid = precipitate
Chapter 7 Reactions in Aqueous Solutions 1 Section 7.1 Predicting Whether a Reaction Will Occur Four Driving Forces Favor Chemical Change 1. Formation of a solid 2. Formation of water 3. Transfer of electrons
More informationCH 223 Sample Exam Exam II Name: Lab Section:
Exam II Name: Lab Section: Part I: Multiple Choice Questions (100 Points) Use a scantron sheet for Part I. There is only one best answer for each question. 1. Which of the following equations is the solubility
More informationCHEMISTRY 123 FALL 2010 Midterm #2
CHEMISTRY 123 FALL 2010 Midterm #2 Test Booklet A - For Question 1 Your name: Your Student ID number: Your TA: This packet MUST be turned in following the exam There are multiple versions of the exam.
More informationBalancing Redox Equations in Acidic Solutions. 6 2Cr H 2 O. 6 2Cr 3+ Example 1: Balance the following equation for the reaction of Cr 2 O 7
Balancing Redox Equations in Acidic Solutions Example 1: Balance the following equation for the reaction of Cr 2 O 7 2 with Fe 2+ in an acidic solution. Cr 2 O 7 2 + Fe 2+ 6 Cr 3+ + Fe 3+ Step 1: Divide
More informationCHAPTER 16 ACID-BASE EQUILIBRIA AND SOLUBILITY EQUILIBRIA
CHAPTER 16 ACID-BASE EQUILIBRIA AND SOLUBILITY EQUILIBRIA 16.3 (a) This is a weak acid problem. Setting up the standard equilibrium table: CH 3 COOH(aq) H + (aq) + CH 3 COO (aq) Initial (M): 0.40 0.00
More informationUnit 5: Chemical Equations and Reactions & Stoichiometry
pg. 10 Unit 5: Chemical Equations and Reactions & Stoichiometry Chapter 8: Chemical Equations and Reactions 8.1: Describing Chemical Reactions Selected Chemistry Assignment Answers (Section Review on pg.
More informationChapter 4 Suggested end-of-chapter problems with solutions
Chapter 4 Suggested end-of-chapter problems with solutions a. 5.6 g NaHCO 1 mol NaHCO 84.01 g NaHCO = 6.69 10 mol NaHCO M = 6.69 10 mol 50.0 m 1000 m = 0.677 M NaHCO b. 0.1846 g K Cr O 7 1 mol K 94.0 g
More information! b. Calculate the ph of the saturated solution. (Hint: How many OH ions form for every Zn(OH) 2 that dissolves? Calculate poh, then ph.)! (8.
AP Chem Worksheet: Solubility Product, K sp Page 1 Write your chemical equations for dissolving the solid and the K sp expression before trying to solve the problems!! 1. The molar solubility of copper(i)
More informationCHAPTER 16 SOLUBILITY AND COMPLEX ION EQUILIBRIA. Questions
CHAPTER 16 SOLUBILITY AND COMPLEX ION EQUILIBRIA Questions 8. MX(s) M n+ (aq) + X n (aq) K sp = [M n+ [X n ; the K sp reaction always refers to a solid breaking up into its ions. The representations all
More information116 PLTL Activity sheet / Solubility Equilibrium Set 11
Predicting Solubility Solubility problems are equilibrium problems. The reactant in a solubility equilibrium is a slightly soluble salt and the equilibrium constant for the reaction is the solubility product
More informationSOLUBILITY AND PRECIPITATION EQUILIBRIA
16 CHAPTER SOLUBILITY AND PRECIPITATION EQUILIBRIA 16.1 The Nature of Solubility Equilibria 16.2 Ionic Equilibria between Solids and Solutions 16.3 Precipitation and the Solubility Product 16.4 The Effects
More informationSOLUBILITY AND PRECIPITATION EQUILIBRIA
16 CHAPTER SOLUBILITY AND PRECIPITATION EQUILIBRIA 16.1 The Nature of Solubility Equilibria 16.2 Ionic Equilibria between Solids and Solutions 16.3 Precipitation and the Solubility Product 16.4 The Effects
More informationM10/4/CHEMI/SPM/ENG/TZ2/XX+ CHEMISTRY. Wednesday 12 May 2010 (afternoon) 45 minutes INSTRUCTIONS TO CANDIDATES
M10/4/CHEMI/SPM/ENG/TZ/XX+ 106116 CHEMISTRY standard level Paper 1 Wednesday 1 May 010 (afternoon) 45 minutes INSTRUCTIONS TO CANDIDATES Do not open this examination paper until instructed to do so. Answer
More information****************************************************************************
**************************************************************************** To quickly summarize: 1. The solubility of a compound is decreased when an ion which is the same as one of the ions in the compound
More informationCHEM 10123/10125, Exam 2
CHEM 10123/10125, Exam 2 March 7, 2012 (50 minutes) Name (please print) Please box your answers, and remember that significant figures, phases (for chemical equations), and units do count! 1. (13 points)
More informationCHAPTER 16 ACID-BASE EQUILIBRIA AND SOLUBILITY EQUILIBRIA
CHAPTER 16 ACID-BASE EQUILIBRIA AND SOLUBILITY EQUILIBRIA 16.5 (a) This is a weak acid problem. Setting up the standard equilibrium table: CH 3 COOH(aq) H (aq) CH 3 COO (aq) Initial (): 0.40 0.00 0.00
More informationCHEM Dr. Babb s Sections Exam #4 Review Sheet
CHEM 116 - Dr. Babb s Sections Exam #4 Review Sheet 158. Explain using the HC 2 H 3 O 2 /NaC 2 H 3 O 2 buffer system how a buffer maintains a relatively constant ph when small quantity of acid (HCl) or
More informationExperiment 14 - Qualitative Analysis
Introduction Qualitative analysis involves the identification of the substances in a mixture. When chemical methods are used in the identification of mixtures of metal cations, these ions are usually separated
More information8. Relax and do well.
CHEM 1225 Exam III John III. Gelder April 8, 1999 Name TA's Name Lab Section INSTRUCTIONS: 1. This examination consists of a total of 7 different pages. The last two pages includes a periodic table and
More informationAP Chemistry Table of Contents: Ksp & Solubility Products Click on the topic to go to that section
Slide 1 / 91 Slide 2 / 91 AP Chemistry Aqueous Equilibria II: Ksp & Solubility Products Table of Contents: K sp & Solubility Products Slide 3 / 91 Click on the topic to go to that section Introduction
More informationPredicting LA-LB reactions
Predicting LA-LB reactions A chemical reaction is governed by G rxn
More information8. Relax and do well.
CHEM 15 Exam II John II. Gelder March 4, 1999 Name TA's Name Lab Section INSTRUCTIONS: 1. This examination consists of a total of 7 different pages. The last two pages includes a periodic table, a solubility
More informationChemistry COPYRIGHT SASTA 2018 WORKBOOK TOPICS. SACE STAGE 1 Australian Curriculum. SECOND EDITION Rhys Lewis. > Materials and their atoms
WORKBOOK SACE STAGE 1 Australian Curriculum Chemistry TOPICS > Materials and their atoms > Combining atoms > Molecules > Mixtures and solutions > Acids and bases > Redox reactions Supporting Teachers of
More informationChemistry 12. Resource Exam B. Exam Booklet
Chemistry 12 Resource Exam B Exam Booklet Contents: 21 pages Examination: 2 hours 50 multiple-choice questions in the Exam Booklet Additional Time Permitted: 60 minutes Province of British Columbia PART
More informationReview 7: Solubility Equilibria
Review 7: Solubility Equilibria Objectives: 1. Be able to write dissociation equations for ionic compounds dissolving in water. 2. Given Ksp, be able to determine the solubility of a substance in both
More informationFormulas and Constants (you may remove this page)
Formulas and Constants (you may remove this page) NA = 6.0x0 3 mol - h = 6.66x0-34 J s c =.99x0 m s - e =.60x0-9 C me = 9.09x0-3 kg Å = x0-0 m = 00 pm atm = 760 torr R = 0.006 L atm K - mol - =.34 J K
More information(please print) (1) (18) H IIA IIIA IVA VA VIA VIIA He (2) (13) (14) (15) (16) (17)
CHEM 10113, Quiz 3 September 28, 2011 Name (please print) All equations must be balanced and show phases for full credit. Significant figures count, show charges as appropriate, and please box your answers!
More information(aq) 5VO2 + (aq) + Mn 2+ (aq) + 10H + + 4H 2 O. (aq) 5VO2 + (aq) + Mn 2+ (aq) + 2H + (aq) basic solution. MnO2 + 2H 2 O) 3H 2 O + I IO 3
Chem 1515 Section 2 Problem Set #15 Spring 1998 Name ALL work must be shown to receive full credit. Due Due in lecture at 1:30 p.m. Friday, May 1st. PS15.1. Balance the following oxidation-reduction reactions
More informationChemistry 1A3 Instructor: R.S. Dumont Supplementary Problem Solutions Types of Reactions
Chemistry 1A3 Instructor: R.S. Dumont Supplementary Problem Solutions Types of Reactions 1. (a) 2 Ca(s) + O 2 (g) 2CaO(s) (b) 2 Na(s) + Cl 2 (g) 2NaCl(s) (c) 16 Ga(s) + 3 S 8 (s) 8Ga 2 S 3 (s) (d) 3 Ba(s)
More information7. Relax and do well.
CHEM 1215 Exam II John II. Gelder October 7, 1998 Name TA's Name Lab Section INSTRUCTIONS: 1. This examination consists of a total of 5 different pages. The last page includes a periodic table and a solubility
More informationCHAPTER 11 AQUEOUS EQUILIBRIA
CHAPTER 11 AQUEOUS EQUILIBRIA 11.1 (a) When solid sodium acetate is added to an acetic acid solution, the concentration of HO decreases because the equilibrium HC H O (aq) H O(l) H O (aq) C H O (aq) shifts
More informationTYPES OF CHEMICAL REACTIONS
TYPES OF CHEMICAL REACTIONS Precipitation Reactions Compounds Soluble Ionic Compounds 1. Group 1A cations and NH 4 + 2. Nitrates (NO 3 ) Acetates (CH 3 COO ) Chlorates (ClO 3 ) Perchlorates (ClO 4 ) Solubility
More informationOAC UNIT 4 - SOLUBILITY EQUILIBRIA - ANSWERS
OAC UNIT 4 - SOLUBILITY EQUILIBRIA - ANSWERS 1. a) NH 3 is most likely ( H = 201 ) **enthalpy (difference between the energy req d to break up the crystal lattice and the energy obtained in the hydration
More informationChemistry 12 Provincial Exam Workbook Unit 03: Solubility Equilibrium. Multiple Choice Questions
R. Janssen, MSEC Chemistry 1 Provincial Workbook (Unit 0), P 1 / 7 Chemistry 1 Provincial Exam Workbook Unit 0: Solubility Equilibrium Multiple Choice Questions 1. Which of the following would be true
More informationCircle the letters only. NO ANSWERS in the Columns!
Chemistry 1304.001 Name (please print) Exam 5 (100 points) April 18, 2018 On my honor, I have neither given nor received unauthorized aid on this exam. Signed Date Circle the letters only. NO ANSWERS in
More informationREVIEW QUESTIONS Chapter 19
Chemistry 10 ANSWER KEY REVIEW QUESTIONS Chapter 19 1. For each of the following unbalanced equations, (i) write the half-reactions for oxidation and reduction, and (ii) balance the overall equation in
More informationAqueous Equilibria: Part II- Solubility Product
Aqueous Equilibria: Part II- Solubility Product PSI AP Chemistry Name-------------------------- I Solubility Product, K sp MC #63-103 a) Writing K sp expression b) Solving for K sp c) Solving for (molar)
More informationPROVINCIAL EXAMINATION MINISTRY OF EDUCATION CHEMISTRY 12 GENERAL INSTRUCTIONS
INSERT STUDENT I.D. NUMBER (PEN) STICKER IN THIS SPACE JUNE 1998 PROVINCIAL EXAMINATION MINISTRY OF EDUCATION CHEMISTRY 12 GENERAL INSTRUCTIONS 1. Insert the stickers with your Student I.D. Number (PEN)
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 informationSolutions and Ions. Pure Substances
Class #4 Solutions and Ions CHEM 107 L.S. Brown Texas A&M University Pure Substances Pure substance: described completely by a single chemical formula Fixed composition 1 Mixtures Combination of 2 or more
More information8. Relax and do well.
CHEM 1215 Exam III John III. Gelder November 11, 1998 Name TA's Name Lab Section INSTRUCTIONS: 1. This examination consists of a total of 7 different pages. The last page includes a periodic table and
More informationCHEM 10123/10125, Exam 3
CHEM 10123/10125, Exam 3 April 4, 2012 (50 minutes) Name (please print) Please box your answers, and remember that significant figures, phases (for chemical equations), and units do count! 1. (18 points)
More informationOctober 19, 1999 Page 1. Chapter 4 Practice Worksheet Dr. Palmer Graves, Instructor MULTIPLE CHOICE
October 19, 1999 Page 1 MULTIPLE CHOICE Section 4.1 Some Ways that Chemical Reactions Occur 1. The reaction of HNO (aq) + KOH(aq) KNO (aq) + H O(l) is best classified as a(n) a) acid-base neutralization
More information[ ]:543.4(075.8) 35.20: ,..,..,.., : /... ;. 2-. ISBN , - [ ]:543.4(075.8) 35.20:34.
.. - 2-2009 [661.87.+661.88]:543.4(075.8) 35.20:34.2373-60..,..,..,..,.. -60 : /... ;. 2-. : -, 2008. 134. ISBN 5-98298-299-7 -., -,,. - «,, -, -», - 550800,, 240600 «-», -. [661.87.+661.88]:543.4(075.8)
More informationChemistry Standard level Paper 1
M15/4/CHEMI/SPM/ENG/TZ1/XX Chemistry Standard level Paper 1 Thursday 14 May 2015 (afternoon) 45 minutes Instructions to candidates Do not open this examination paper until instructed to do so. Answer all
More information1) What is the volume of a tank that can hold Kg of methanol whose density is 0.788g/cm 3?
1) Convert the following 1) 125 g to Kg 6) 26.9 dm 3 to cm 3 11) 1.8µL to cm 3 16) 4.8 lb to Kg 21) 23 F to K 2) 21.3 Km to cm 7) 18.2 ml to cm 3 12) 2.45 L to µm 3 17) 1.2 m to inches 22) 180 ºC to K
More informationCHEM 107 (Spring-2004) Exam 2 (100 pts)
CHEM 107 (Spring-2004) Exam 2 (100 pts) Name: ------------------------------------------------------------------------, SSN -------------------------------- LAST NAME, First (Circle the alphabet segment
More informationExam3Fall2009thermoelectro
Exam3Fall2009thermoelectro Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. 1. Thermodynamics can be used to determine all of the following EXCEPT
More informationIonic Compound Solubility. Ionic Compound Solubility. Nitrates (NO 3 - ) Chlorates (ClO 3 - ) Ionic Compound Solubility. Ionic Compound Solubility
Nitrates (NO 3 - ) Chlorates (ClO 3 - ) Perchlorates (ClO 4 - ) Acetates (C 2 H 3 O 2 - ) Alkali Metal Compounds (Li +,Na +,K +,Rb +,Cs + ) Ammonium Compounds (NH 4 + ) Chlorides (Cl - ) Bromides (Br -
More informationTRU Chemistry Contest Chemistry 12 May 21, 2003 Time: 90 minutes
TRU Chemistry Contest Chemistry 12 May 21, 2003 Time: 90 minutes Last Name First name School Teacher Please follow the instructions below. We will send your teacher a report on your performance. Top performers
More informationReactions in Aqueous Solutions
Chapter 4 Reactions in Aqueous Solutions Some typical kinds of chemical reactions: 1. Precipitation reactions: the formation of a salt of lower solubility causes the precipitation to occur. precipr 2.
More informationhttp://redoxanswers.weebly.com REDOX LESSON LEARNING GOALS http://redoxanswers.weebly.com Lesson 1: Introduction to Redox Relate to examples of oxidation-reduction reactions in the real-world. Understand
More informationPartial Periodic Table of the Elements
Name (print clearly) Seat number Quiz 3 (100 points) Chemistry 1303.002 September 12, 2018 1. (15 points) One of the following reactions will occur, one will not. Determine which one occurs and then a.
More informationChemistry Standard level Paper 1
Chemistry Standard level Paper 1 Thursday 12 May 2016 (morning) 45 minutes Instructions to candidates Do not open this examination paper until instructed to do so. Answer all the questions. For each question,
More informationOxidation Numbers, ox #
Oxidation Numbers, ox # are or numbers assigned to each or assuming that the are transferred from the electronegative element to the electronegative element. now mimic systems. ox # are written followed
More informationSolubility and Complex-ion Equilibria
Solubility and Complex-ion Equilibria Contents and Concepts Solubility Equilibria 1. The Solubility Product Constant 2. Solubility and the Common-Ion Effect 3. Precipitation Calculations 4. Effect of ph
More informationReaction Kinetics Multiple Choice
Reaction Kinetics Multiple Choice January 1999 1. Consider the reaction: Ca (s) + 2H 2 O (l) Ca(OH) 2 (aq) + H 2 (g) At a certain temperature, 2.50 g Ca reacts completely in 30.0 seconds. The rate of consumption
More information8. Relax and do well.
CHEM 1515 Exam II John II. Gelder October 14, 1993 Name TA's Name Lab Section INSTRUCTIONS: 1. This examination consists of a total of 8 different pages. The last two pages include a periodic table, a
More informationCHEMICAL REACTIONS WORDS, SYMBOLS AND ABBREVIATIONS
CHEMICAL REACTIONS All chemical reactions have two parts: (1) A substance that undergoes a reaction is called a. In other words, reactants are the substances you start with. (2) When reactants undergo
More informationBALANCING EQUATIONS NOTES
BALANCING EQUATIONS NOTES WHY DO WE NEED TO BALANCE CHEMICAL EQUATIONS? The LAW OF CONSERVATION OF MASS says that matter cannot be created or destroyed. In other words, you cannot end up with any more
More informationRedox Worksheet 1: Numbers & Balancing Reactions
Name: Date: Per: Redox Worksheet 1: Numbers & Balancing Reactions Assigning Oxidation Number rules: Elements and Compounds have an oxidation number/total of 0 Group I and II In addition to the elemental
More information4. [7 points] Which of the following reagents would decrease the solubility of AgCl(s)? NaOH HCl NH 3 NaCN
1. [7 points] It takes 0.098 g of silver iodate, AgIO 3, to make 1.00-L of a saturated solution saturated at 25 C. What is the value of the solubility product, K sp? a. 3.5 10 4 b. 1.2 10 7 c. 9.8 10 2
More information2. In each of the following pairs of reactions, which would have the faster reaction rate?
CHEMISTRY 12 REACTION RATES WORKSHEET 1. The following data were collected for the reaction: Zn (s) + 2HCl (aq) H 2(g) + ZnCl 2(aq) in which zinc metal was reacted with 0.200 M HCl (aq) : Time (seconds)
More informationORBITAL DIAGRAM - A graphical representation of the quantum number "map" of electrons around an atom.
178 (MAGNETIC) SPIN QUANTUM NUMBER: "spin down" or "spin up" - An ORBITAL (region with fixed "n", "l" and "ml" values) can hold TWO electrons. ORBITAL DIAGRAM - A graphical representation of the quantum
More informationReactions in Aqueous Solution
1 Reactions in Aqueous Solution Chapter 4 For test 3: Sections 3.7 and 4.1 to 4.5 Copyright The McGrawHill Companies, Inc. Permission required for reproduction or display. 2 A solution is a homogenous
More informationCHAPTER 12. Practice exercises
CHAPTER 12 Practice exercises 12.1 2Al(s) + 3Cl 2 (g) 2AlCl 3 (aq) Aluminium is oxidised and is therefore the reducing agent. Chlorine is reduced and is therefore the oxidising agent. 12.3 First the oxidation
More information] after equilibrium has been established?
Chemistry 1 Solubility Equilibrium onster Review 1. A saturated solution forms when a 0. 10 mol of salt is added to 10. L of water. The salt is A. Li S B. CuBr C. Zn( OH) ( ) D. NH CO 4. Consider the following
More informationChapter 5 - Homework solutions
Chapter 5 - Homework solutions Q Ex 1,2,3,4,5,7,9,13,18,20,21,23, 27,29 and Prob. 3,4,6,7 1) Li Be B C N O F acidic Na Mg Al Si P S Cl amphoteric K Ca Ga Ge As Se Br basic Rb Sr In Sn Sb Te I Cs Ba Tl
More information