1 Which is the equation for the reaction when steam passes over strongly heated magnesium? A. Mg(s) + 2H 2 O(l) Mg(OH) 2 (aq) + H 2 (g)
|
|
|
- Camilla Rice
- 6 years ago
- Views:
Transcription
1 1 Which is the equation for the reaction when steam passes over strongly heated magnesium? Mg(s) + 2H 2 O(l) Mg(OH) 2 (aq) + H 2 (g) Mg(s) + 2H 2 O(g) Mg(OH) 2 (s) + H 2 (g) Mg(s) + H 2 O(l) MgO(s) + H 2 (g) Mg(s) + H 2 O(g) MgO(s) + H 2 (g) 2 Which one of the following substances forms when a few drops of concentrated sulfuric acid is added to sodium chloride? H 2 O l 2 NaHSO 4 SO 2 PhysicsndMathsTutor.com
2 3 This question is about the reaction between sodium carbonate solution and dilute nitric acid. Na 2 O 3 (aq) + 2HNO 3 (aq) 2NaNO 3 (aq) + O 2 (g) + H 2 O(l) (a) What is the ionic equation for this reaction? Na 2 O 3 (aq) + 2H + (aq) 2Na + (aq) + O 2 (g) + H 2 O(l) Na + (aq) + N 3 (aq) NaNO 3 (aq) O 3 2 _ (aq) + 2H + (aq) O 2 (g) + H 2 O(l) O 3 2 _ (aq) + 2HNO 3 (aq) 2NO 3 (aq) + O 2 (g) + H 2 O(l) (b) What is the volume of carbon dioxide produced from the complete reaction of 0.10 mol of nitric acid at room temperature and pressure? [1 mol of any gas occupies 24 dm 3 at room temperature and pressure.] 1.2 dm dm dm dm 3 (c) What volume of sodium carbonate solution of concentration mol dm 3, would be needed to completely react with 25.0 cm 3 of nitric acid of concentration mol dm 3? 6.25 cm cm cm cm 3 = 3 marks) PhysicsndMathsTutor.com
3 4 In which of the following reactions is sulfuric(iv) acid, H 2 SO 3, acting as an oxidizing agent? H 2 SO 3 + H 2 O H 3 O + + HSO 3 H 2 SO 3 SO 2 + H 2 O H 2 SO 3 + 2Fel 3 + H 2 O 2Fel 2 + H 2 SO 4 + 2Hl H 2 SO 3 + 2H 2 S 3H 2 O + 3S 5 Which of the following is a redox reaction? r 2 O OH 2 2rO 4 + H 2 O [u(h 2 O) 6 ] l [ul 4 ] 2 + 6H 2 O 4OH 2 + 4MnO 4 4MnO 4 + 2H 2 O + O 2 [Fe(H 2 O) 6 ] OH [Fe(H 2 O) 3 (OH) 3 ] + 3H 2 O 6 The oxidation state of nickel is not +2 in [Ni(O) 4 ] [Ni(H 2 O) 4 (OH) 2 ] [Ni(NH 3 ) 6 ] 2+ [Ni(N) 4 ] 2 PhysicsndMathsTutor.com
4 7 What is the oxidation number of phosphorus in P 4 O 6? What is the oxidation number of chlorine in l 2 O 7? The thermite reaction, shown below, is a useful industrial process. The iron in this reaction undergoes Fe 2 O 3 (s) + 2l(s) 2Fe(l) + l 2 O 3 (s) disproportionation. oxidation. redox. reduction. PhysicsndMathsTutor.com
5 The equation representing the reaction between copper(ii) oxide and dilute sulfuric acid is uo(s) + H 2 SO 4 (aq)uso 4 (aq) + H 2 O(l) The ionic equation for the reaction is u 2+ (s) + SO 4 2 (aq)uso 4 (aq) O 2 (s) + H 2 SO 4 (aq)h 2 O(l) + SO 4 2 (aq) uo(s) + 2H + (aq)u 2+ (aq) + H 2 O(l) uo(s) + H 2 SO 4 (aq)u 2+ SO 4 2 (aq) + H 2 O(l) 12 The oxidation number of sulfur in sodium hydrogensulfide, NaHS, is PhysicsndMathsTutor.com
6 13 Which of the following is not a disproportionation reaction? l 2 + 2OH l + lo + H 2 O u 2 O + H 2 SO 4 uso 4 + u + H 2 O 3IO 2I + IO 3 u + 4HNO 3 u(no 3 ) 2 + 2H 2 O + 2NO 2 14 When solutions of iodine are titrated with aqueous sodium thiosulfate solution, Na 2 S 2 O 3 (aq), the thiosulfate ions are oxidized to S 2 O 4 2 S 2 O 6 2 S 2 O 8 2 S 4 O What is the oxidation number of chlorine in the lo 3 ion? PhysicsndMathsTutor.com
7 16 Which of these reactions is not a redox reaction? Mg(NO 3 ) 2 (s) MgO(s) + 2NO 2 (g) + ½O 2 (g) Hl(aq) + NaOH(aq) Nal(aq) + H 2 O(l) Fe(s) + uso 4 (aq) FeSO 4 (aq) + u(s) l 2 (aq) + 2r (aq) 2l (aq) + r 2 (aq) 17 Iodine can react with sodium hydroxide solution to form NaIO 3 (aq), according to the equation below. 3I 2 (aq) + 6NaOH(aq) 5NaI(aq) + NaIO 3 (aq) + 3H 2 O(l) Which of the statements about the reaction is false? The oxidation number of some iodine atoms goes up. t high temperatures NaIO(aq) also forms. Sodium ions are spectator ions. The oxidation number of some iodine atoms goes down. 18 When aqueous solutions of barium chloride and potassium sulfate are mixed, a white precipitate forms. The ionic equation for the reaction is + K (aq) + l (aq) Kl(s) K 2+ (aq) + 2l (aq) Kl 2 (s) a + (aq) + SO 4 (aq) aso (s) 4 a 2+ 2 (aq) + SO 4 (aq) aso (s) 4 PhysicsndMathsTutor.com
8 19 When g of copper (relative atomic mass, RM = 63.5) is added to an excess of silver nitrate solution, g of silver (RM = 107.9) form. The ionic equation for the reaction is u(s) + g 2+ (aq) u 2+ (aq) + g(s) u(s) + g + (aq) u + (aq) + g(s) 2u(s) + g 2+ (aq) 2u + (aq) + g(s) u(s) + 2g + (aq) u 2+ (aq) + 2g(s) 2 20 The oxidation number of sulfur in thiosulfate ions, S 2 O 3, is Which of the following is a redox reaction? a + 2H 2 O a(oh) 2 + H 2 MgO + H 2 O Mg(OH) 2 Nal + gno 3 gl + NaNO 3 Na 2 O 3 + 2Hl 2Nal + O 2 + H 2 O PhysicsndMathsTutor.com
9 22 What is the oxidation number of oxygen in OF 2? In which of the following reactions is sulfuric(iv) acid, H 2 SO 3, acting as an oxidizing agent? 2NaOH + H 2 SO 3 Na 2 SO 3 + 2H 2 O 2Fel 3 + H 2 SO 3 + H 2 O 2Fel 2 + H 2 SO 4 + 2Hl 2H 2 S + H 2 SO 3 3H 2 O + 3S H 2 SO 3 H 2 O + SO 2 24 For the oxidation of ammonia a NH 3 + b O 2 c NO + d H 2 O the values of the coefficients in the balanced equation are a 2, b 3, c 2 and d 3 a 4, b 7, c 4 and d 4 a 4, b 5, c 4 and d 6 a 6, b 7, c 6 and d 9 PhysicsndMathsTutor.com
10 25 hemical reactions may involve oxidation reduction no change in oxidation number disproportionation Which of the terms above best describes what happens to the chlorine in the following reactions? (a) l 2 (g) + H 2 O(l) Hl(aq) + HOl(aq) (b) 2(g) + 2Na(s) 2Nal(s) (c) Nal(s) + H 2 SO 4 (l) Hl(g) + NaHSO 4 (s) = 3 marks) PhysicsndMathsTutor.com
Redox. Question Paper. Cambridge International Examinations Chemical Reactions. Score: /43. Percentage: /100
Redox Question Paper Level Subject Exam oard Topic Sub-Topic ooklet O Level hemistry ambridge International Examinations hemical Reactions Redox Question Paper Time llowed: 52 minutes Score: /43 Percentage:
Stoichiometry. Question Paper 2. Chemistry (0620/0971) Cambridge International Examinations (CIE) Topic. Stoichiometry. Stoichiometry.
For more awesome resources, visit us at www.savemyexams.co.uk/ Stoichiometry Question Paper 2 Level IGSE Subject hemistry (0620/0971) Exam Board ambridge International Examinations (IE) Topic Stoichiometry
sodium ions have a larger charge density than magnesium ions. the repulsion between the ions in sodium is less than in magnesium.
1 The melting temperature of sodium is lower than the melting temperature of magnesium. The best explanation for this is sodium atoms are smaller than magnesium atoms. sodium ions have a larger charge
Slide 1 / 62. Slide 2 / 62. Slide 3 / 62 A 1,3,2,3 B 2,12,4,6 E 2,3,1,1 A 4,6,6,2 B 2,3,2,3 E 2,3,1,2 A 4,3,2,6 B 2,1,2,3 E 3,4,6,2
1 What are the missing coefficients for the skeleton equation below? l 2 (SO 4 ) 3 (aq) + KOH(aq) l(oh) 3 (aq) + K 2 SO 4 (aq) Slide 1 / 62 1,3,2,3 2,12,4,6 4,6,2,3 1,6,2,3 2,3,1,1 2 What are the missing
The characteristic Properties of Acids and
For more awesome GSE and level resources, visit us at www.savemyexams.co.uk/ The haracteristic Properties of cids and ases Question Paper Level Subject Exam oard Topic Sub-Topic ooklet O Level hemistry
CHAPTER 4 TYPES OF CHEMICAL REACTIONS & SOLUTION STOICHIOMETRY
Advanced Chemistry Name Hour Advanced Chemistry Approximate Timeline Students are expected to keep up with class work when absent. CHAPTER 4 TYPES OF CHEMICAL REACTIONS & SOLUTION STOICHIOMETRY Day Plans
Save My Exams! The Home of Revision For more awesome GCSE and A level resources, visit us at Redox.
For more awesome GSE and level resources, visit us at www.savemyexams.co.uk/ Redox Question Paper Level Subject Exam oard Topic Sub-Topic Paper Type International Level hemistry IE Electrochemistry Redox
2 Calculate the total number of ions in 7.41 g of calcium hydroxide, Ca(OH) 2.
1 The mass of magnesium ions in 1 kg of sea water is 1.3 g. The concentration in parts per million (ppm) is 1.3 10 6 1.3 10 3 1.3 10 3 1.3 10 6 2 alculate the total number of ions in 7.41 g of calcium
Questions Q1. The first ionization energies, in kj mol -1, of four elements with consecutive atomic numbers are shown below. A 1680 B 2080 C 496 D 738
Questions Q1. The first ionization energies, in kj mol -1, of four elements with consecutive atomic numbers are shown below. 1680 2080 496 738 (a) Which element could be an inert gas? (b) Which element
Slide 1 / 90. Slide 2 / 90. Slide 3 / 90 A B. percent yield stoichiometry A B. atoms and mass
Stoichiometry HW Slide 1 / 90 Grade:«grade» Subject: ate:«date» 1 The calculation of quantities in chemical equations is called. Slide 2 / 90 accuracy and precision dimensional analysis percent composition
Chem!stry. Mole Calculations Assignment Twelve
Chem!stry Name: ( ) Class: Date: / / Mole Calculations Assignment Twelve 1. A gas is 46.2% carbon and 53.8% nitrogen. Under conditions of room temperature and pressure (r.t.p.) the volume of the gas is
For 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
Hydrated nickel(ii) salts are green in colour. Give the electron configuration of a nickel(ii) ion and hence state why the ion is coloured.
1. This question is about nickel compounds. (a) Hydrated nickel(ii) salts are green in colour. Give the electron configuration of a nickel(ii) ion and hence state why the ion is coloured.......... (b)
2.67 g (Total 1 mark)
Q1. The chloride of an element Z reacts with water according to the following equation. Zl 4(l) + 2H 2O(l) ZO 2(s) + 4Hl(aq) 1.304 g sample of Zl 4 was added to water. The solid ZO 2 was removed by filtration
6V d.c. supply. State the form of energy used to carry out the electrolysis. (1)
1 (a) Water, acidified with a small amount of dilute sulfuric acid, can be decomposed by electrolysis using the apparatus shown. oxygen hydrogen acidified water + (i) 6V d.c. supply State the form of energy
A C 8 H 18 B C 7 H 16 C C 6 H 14 D C 5 H Which of the following statements is true? The Avogadro constant is the number of
1 omplete combustion of 50 cm 3 of a hydrocarbon vapour gave 350 cm 3 of carbon dioxide, both gas volumes being measured at the same temperature and pressure. The formula of the hydrocarbon could be 8
CHEMISTRY 135 REVISION OF NAMES, FORMULAE AND EQUATIONS
CHEMISTRY 135 REVISION OF NAMES, FORMULAE AND EQUATIONS Answer the following questions as if you were going to hand them in for marking. You will be tested on them in class time. 1) Give the correct chemical
MOLES AND EQUATIONS. Answer all questions. Max 51 marks. Mark../51...% Grade. Paddington Academy 1
MOLES AND EQUATIONS Answer all questions Max 51 marks Name.. Mark../51...% Grade Paddington Academy 1 1. In the sixteenth century, a large deposit of graphite was discovered in the Lake District. People
Chapter 4. The Major Classes of Chemical Reactions 4-1
Chapter 4 The Major Classes of Chemical Reactions 4-1 The Major Classes of Chemical Reactions 4.1 The Role of Water as a Solvent 4.2 Writing Equations for Aqueous Ionic Reactions 4.3 Precipitation Reactions
1. Hydrochloric acid is mixed with aqueous sodium bicarbonate Molecular Equation
NAME Hr Chapter 4 Aqueous Reactions and Solution Chemistry Practice A (Part 1 = Obj. 1-3) (Part 2 = Obj. 4-6) Objective 1: Electrolytes, Acids, and Bases a. Indicate whether each of the following is strong,
Which two diagrams show suitable methods for investigating the rate (speed) of the reaction?
1 liquid X reacts with solid Y to form a gas. Which two diagrams show suitable methods for investigating the rate (speed) of the reaction? 1 2 cotton wool cotton wool X Y X Y balance 3 4 stopper stopper
Practice Exam Topic 9: Oxidation & Reduction
Name Practice Exam Topic 9: Oxidation & Reduction 1. What are the oxidation numbers of the elements in sulfuric acid, H 2 SO 4? Hydrogen Sulfur Oxygen A. +1 +6 2 B. +1 +4 2 C. +2 +1 +4 D. +2 +6 8 2. Consider
Describe the structure and bonding in a metallic element. You should include a labelled diagram in your answer. ... [3] ...
![Describe the structure and bonding in a metallic element. You should include a labelled diagram in your answer. ... [3] ...](/thumbs/78/76733031.jpg "Describe the structure and bonding in a metallic element. You should include a labelled diagram in your answer. ... [3] ...")
3 Gallium is a metallic element in Group III. It has similar properties to aluminium. (a) (i) Describe the structure and bonding in a metallic element. You should include a labelled diagram in your answer.
1.24 Calculations and Chemical Reactions
1.24 Calculations and Chemical Reactions Converting quantities between different substances using a balanced equation A balanced chemical equation tells us the number of particles of a substance which
5. [7 points] What is the mass of gallons (a fifth) of pure ethanol (density = g/cm 3 )? [1 gallon = Liters]
![5. [7 points] What is the mass of gallons (a fifth) of pure ethanol (density = g/cm 3 )? [1 gallon = Liters]](/thumbs/71/66177002.jpg "5. [7 points] What is the mass of gallons (a fifth) of pure ethanol (density = g/cm 3 )? [1 gallon = Liters]")
1 of 6 10/20/2009 3:55 AM Avogadro s Number, N A = 6.022 10 23 1. [7 points] Given the following mathematical expression: (15.11115.0)/(2.154 10 3 ) How many significant figures should the answer contain?
For Practice 4.1 Magnesium hydroxide, the active ingredient in milk of magnesia, neutralizes stomach acid, primarily HCl, according to the reaction:
Stoichiometry For Practice 4.1 Magnesium hydroxide, the active ingredient in milk of magnesia, neutralizes stomach acid, primarily HCl, according to the reaction: What mass of HCl, in grams, is neutralized
Unit 4: Reactions and Stoichiometry
Unit 4: Reactions and Stoichiometry Reactions Chemical equation Expression representing a chemical reaction Formulas of reactants on the left side Formulas of products on the right side Arrow(s) connect(s)
Practice Problems: Set #3-Solutions
Practice Problems: Set #3-Solutions IIa) Balance the following equations:(10) 1) Zn (s) + H 3 PO 4 (aq) Zn 3 (PO 4 ) 2 (s) + H 2 (g) 3Zn (s) + 2H 3 PO 4 (aq) Zn 3 (PO 4 ) 2 (s) + 3H 2 (g) 2. Mg 3 N 2 (s)
Page 1. Exam 2 Review Summer A 2002 MULTIPLE CHOICE. 1. Consider the following reaction: CaCO (s) + HCl(aq) CaCl (aq) + CO (g) + H O(l)
Page 1 MULTIPLE CHOICE 1. Consider the following reaction: CaCO (s) + HCl(aq) CaCl (aq) + CO (g) + H O(l) The coefficient of HCl(aq) in the balanced reaction is. a) 1 b) 2 c) 3 d) 4 e) 0 2. Given the information
Reactions (Chapter 4) Notes 2016.notebook. October 14, Chemical Reactions. Chapter 4 Notes. Oct 21 8:44 AM. Oct 22 10:14 AM
Chemical Reactions Chapter 4 Notes Oct 21 8:44 AM Oct 22 10:14 AM 1 There are several things to keep in mind writing reactions and predicting products: 1. States of matter of elements/compounds 2. Diatomics
Write an overall equation for the first stage in the rusting of iron.
1. (a) Define the term standard electrode potential............. (b) When a metal is placed in a solution of its ions, the electrical potential set up between the metal and the solution cannot be measured
11.3 Reactions in Aqueous Essential Understanding Reactions that occur in aqueous solutions are double-replacement
13. Is the following sentence true or false? Hydrocarbons, compounds of hydrogen and carbon, are often the reactants in combustion reactions. 14. Circle the letter of each compound that can be produced
Write the ionic equation for this neutralisation reaction. Include state symbols.
Q1.Sodium hydroxide neutralises sulfuric acid. The equation for the reaction is: 2NaOH + H 2 SO 4 Na 2 SO 4 + 2H 2 O (a) Sulfuric acid is a strong acid. What is meant by a strong acid? (b) Write the ionic
During photosynthesis, plants convert carbon dioxide and water into glucose (C 6 H 12 O 6 ) according to the reaction:
Example 4.1 Stoichiometry During photosynthesis, plants convert carbon dioxide and water into glucose (C 6 H 12 O 6 ) according to the reaction: Suppose that a particular plant consumes 37.8 g of CO 2
Reactions in Aqueous Solutions
Reactions in Aqueous Solutions 1 Chapter 4 General Properties of Aqueous Solutions (4.1) Precipitation Reactions (4.2) Acid-Base Reactions (4.3) Oxidation-Reduction Reactions (4.4) Concentration of Solutions
PRACTICE EXAMINATION QUESTIONS FOR 1.2 AMOUNT OF SUBSTANCE
PRACTICE EXAMINATION QUESTIONS FOR 1.2 AMOUNT OF SUBSTANCE 1. Nitroglycerine, C 3 H 5 N 3 O 9, is an explosive which, on detonation, decomposes rapidly to form a large number of gaseous molecules. The
Chem!stry. Assignment on Acids, Bases and Salts #
Chem!stry Name: ( ) Class: Date: / / Assignment on Acids, Bases and Salts #5 Write your answers in the spaces below: 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 1. Which of the
3.2.5 Group VII. Trends in oxidising abilities. 167 minutes. 167 marks. Page 1 of 19
3..5 Group VII Trends in oxidising abilities 167 minutes 167 marks Page 1 of 19 Q1. (a) Samples of solid sodium fluoride, sodium chloride, sodium bromide and sodium iodide are each warmed separately with
Stoichiometry. Question Paper 1. Subject Chemistry (0620/0971) Cambridge International Examinations (CIE) Topic. Stoichiometry.
Stoichiometry Question Paper 1 Level IGSE Subject hemistry (0620/0971) Exam oard ambridge International Examinations (IE) Topic Stoichiometry Sub-Topic Stoichiometry ooklet Question Paper 1 Time llowed:
Chapter 8 Chemical Reactions
Chemistry/ PEP Name: Date: Chapter 8 Chemical Reactions Chapter 8: 1 7, 9 18, 20, 21, 24 26, 29 31, 46, 55, 69 Practice Problems 1. Write a skeleton equation for each chemical reaction. Include the appropriate
F321: Atoms, Bonds and Groups Moles and Equations
F321: Atoms, Bonds and Groups Moles and Equations 108 Marks 1. (a) A student carries out a titration to find the concentration of some sulfuric acid. The student finds that 25.00 cm 3 of 0.0880 mol dm
CHAPTER 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.
Chapter 4. Reactions in Aqueous Solution
Chapter 4 Reactions in Aqueous Solution Topics General properties of aqueous solutions Precipitation reactions Acid base reactions Oxidation reduction reactions Concentration of solutions Aqueous reactions
(DO NOT WRITE ON THIS TEST)
Final Prep Chap 8&9 (DO NOT WRITE ON THIS TEST) Multiple Choice Identify the choice that best completes the statement or answers the question. 1. After the correct formula for a reactant in an equation
Reaction Writing Sheet #1 Key
Reaction Writing Sheet #1 Key Write and balance each of the following reactions and indicate the reaction type(s) present: 1. zinc + sulfur zinc sulfide 8 Zn (s) + S 8 (s) 8 ZnS (s) synthesis 2. potassium
Rate (speed) of reaction
Rate (speed) of reaction Question Paper 1 Level IGSE Subject hemistry (62/971) Exam oard ambridge International Examinations (IE) Topic hemical reactions Sub-Topic Rate (speed) of reaction ooklet Question
least reactive magnesium
1 One way of establishing a reactivity series is by displacement reactions. (a) A series of experiments was carried out using the metals lead, magnesium, zinc and silver. Each metal was added in turn to
Chemical Bonds In elements and compounds, the atoms are held together by chemical bonds.
Chemical Bonds In elements and compounds, the atoms are held together by chemical bonds. Forming a bond makes an atom more stable, so atoms form as many bonds are they are able to. Bonds are made using
# Ans Workings / Remarks
# Ans Workings / Remarks 1 B Atomic mass and temperature affects the rate of diffusion of gas. The lower the atomic mass, the lighter the substance. The higher the temperature, the higher the rate of collision
Question 8 Chemical properties of metals and nonmetals. 1) magnesium 2) sulfur trioxide 3) iron (II) hydroxide 4) sodium nitrate
Question 8 Chemical properties of metals and nonmetals 1. Calcium oxide doesn t react with 1) NaNO 3 2) HCl 3) CO 2 4) H 2 O 2. Calcium oxide reacts with both of the following 1) SO 2 and O 2 2) H 2 O
SECTION A. 1 In which order do the electrons fill the orbitals of an atom? 1s 2s 2p 3s 3p 4s 4p 3d. 1s 2s 2p 3s 3d 3p 4s 4p. 1s 2s 2p 3s 3p 3d 4s 4p
S hemistry Unit 1 SETION nswer LL the questions in this section. You should aim to spend no more than 20 minutes on this section. For each question, select one answer from to D and put a cross in the box.
Chem!stry. Assignment on Redox
Chem!stry Name: ( ) Class: Date: / / Assignment on Redox Question 1: Which one of the following elements is the most powerful reducing agent? A Aluminium B Copper C Lead D Potassium Question 2: Which of
Chemical Reactions: An Introduction
Chemical Reactions: An Introduction Ions in Aqueous Solution Ionic Theory of Solutions Many ionic compounds dissociate into independent ions when dissolved in water H 2O NaCl(s) Na Cl These compounds that
Ch 4-5 Practice Problems - KEY
Ch 4-5 Practice Problems - KEY The following problems are intended to provide you with additional practice in preparing for the exam. Questions come from the textbook, previous quizzes, previous exams,
2. Relative molecular mass, M r - The relative molecular mass of a molecule is the average mass of the one molecule when compared with
Chapter 3: Chemical Formulae and Equations 1. Relative atomic mass, A r - The relative atomic mass of an element is the average mass of one atom of an element when compared with mass of an atom of carbon-12
Chapter 3 Chemical Reactions
Chapter 3 Chemical Reactions Jeffrey Mack California State University, Sacramento Chemical Reactions Reactants: Zn + I 2 Product: ZnI 2 Chemical Reactions Evidence of a chemical reaction: Gas Evolution
Types of Reactions: Reactions
1 Reactions On the A.P. Test there will be one question (question #4) that will say: Give the formulas to show the reactants and the products for the following chemical reactions. Each occurs in aqueous
2 Answer all the questions. 1 This question refers to chemistry of d-block elements in Period 4 (Sc Zn).
2 Answer all the questions. 1 This question refers to chemistry of d-block elements in Period 4 (Sc Zn). (a) For each statement below, select the symbols of the correct element(s). The element that has
9/24/12. Chemistry Second Edition Julia Burdge. Reactions in Aqueous Solutions
Chemistry Second Edition Julia Burdge 4 Reactions in Aqueous Solutions Copyright (c) The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 1 4 Reactions in Aqueous Solutions
A student adds the following volumes of aqueous sodium thiosulfate, dilute hydrochloric acid and distilled water to the conical flask.
1 When aqueous sodium thiosulfate and dilute hydrochloric acid are mixed, a precipitate of insoluble sulfur is produced. This makes the mixture difficult to see through. Na 2 S 2 O 3 (aq) + 2HCl (aq) S(s)
Unit Two Worksheet WS DC U2
Unit Two Worksheet WS DC U2 Name Period Short Answer [Writing]. Write skeleton equations representing the following reactions and then balance them. Then identify the reaction type. Include all needed
5072 CHEMISTRY (NEW PAPERS WITH SPA) BASIC TECHNIQUES 5067 CHEMISTRY (NEW PAPERS WITH PRACTICAL EXAM) BASIC TECHNIQUES
5072 CHEMISTRY (NEW PAPERS WITH SPA) BASIC TECHNIQUES 5067 CHEMISTRY (NEW PAPERS WITH PRACTICAL EXAM) BASIC TECHNIQUES LEARNING OUTCOMES a) Be able to write formulae of simple compounds b) Be able to write
+ H 2 O HPO 4. (a) In this system, there are two acid-base conjugate pairs. These are (1) HPO4
1 The dihydrogenphosphate-hydrogenphosphate ion system is an important buffer in the human body. H 2 PO 4 H 2 O HPO 4 2 H 3 O (a) In this system, there are two acid-base conjugate pairs. These are acid
Chapter 4 Reactions in Aqueous Solutions. Copyright McGraw-Hill
Chapter 4 Reactions in Aqueous Solutions Copyright McGraw-Hill 2009 1 4.1 General Properties of Aqueous Solutions Solution - a homogeneous mixture Solute: the component that is dissolved Solvent: the component
OXIDATION AND REDUCTION
OXIDATION AND REDUCTION IMPORTANT FACTS: IMPORTANT DEFINATIONS Many chemical reactions involve the addition of oxygen or hydrogen to the reactants. The reaction in which oxygen is added is called oxidation
AP Chemistry Note Outline Chapter 4: Reactions and Reaction Stoichiometry:
AP Chemistry Note Outline Chapter 4: Reactions and Reaction Stoichiometry: Water as a solvent Strong and Weak Electrolytes Solution Concentrations How to Make up a solution Types of Reactions Introduction
General Chemistry Multiple Choice Questions Chapter 8
1 Write the skeleton chemical equation for the following word equation: Hydrochloric acid plus magnesium yields magnesium chloride and hydrogen gas. a HClO 4 + Mg --> MgClO 4 + H 2 b HClO 4 + Mg --> MgClO
Electrodeposition. - Worksheet - Envisioning Chemistry. 1. Write half reactions for the following processes under electrical current.
Electrodeposition 1. Write half reactions for the following processes under electrical current. (1). Formation of copper from copper (II) ion Example: Cu 2+ + 2e --> Cu (2). Formation of tin from tin ion
burette filled with sulphuric acid conical flask 25.0 cm 3 of sodium hydroxide(aq) concentration 2.24 mol / dm 3
1 Crystals of sodium sulphate-10-water, Na 2 SO 4.10H 2 O, are prepared by titration. burette filled with sulphuric acid conical flask 25.0 cm 3 of sodium hydroxide(aq) concentration 2.24 mol / dm 3 (a)
(a) Complete Figure 9 by placing one tick in each row to show whether the salt is soluble or insoluble. salt soluble insoluble.
1 The method used to prepare a salt depends on its solubility in water. (a) Complete Figure 9 by placing one tick in each row to show whether the salt is soluble or insoluble. ammonium chloride salt soluble
Intro stoichiometry. 1. Which pair of formulas represents the empirical formula and the molecular formula of a compound?
Name: ate: 1. Which pair of formulas represents the empirical formula and the molecular formula of a compound? 1.. H 2 O, 4 H 6 O 4. HO, 6 H 12 O 6. H 4, 5 H 12. H 2, 3 H 6 2. compound contains 40% calcium,
Elements in the Periodic Table show a periodic trend in atomic radius. In your answer you should use appropriate technical terms, spelled correctly.
1 The Periodic Table is arranged in periods and groups (a) Elements in the Periodic Table show a periodic trend in atomic radius State and explain the trend in atomic radius from Li to F In your answer
4.4. 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
Chapter 8. Chemical Equations and Reactions
Chapter 8 Chemical Equations and Reactions Chemical Equations Represents, w/ symbols & formulas, the reactants & products in a chemical reaction Requirements Must represent the known facts Must contain
F321: Atoms, Bonds and Groups Redox
F321: Atoms, Bonds and Groups Redox 39 Marks 1. The element strontium forms a nitrate, Sr(NO 3 ) 2, which decomposes on heating as shown below. 2Sr(NO 3 ) 2 (s) 2SrO(s) + 4NO 2 (g) + O 2 (g) Using oxidation
2 Answer all the questions. CO, in the presence of aqueous hydrochloric acid, HCl(aq).
2 Answer all the questions. 1 A student investigates the reaction between iodine, I 2, and propanone, (CH 3 ) 2 CO, in the presence of aqueous hydrochloric acid, HCl(aq). The results of the investigation
Some electrode half-equations and their standard electrode potentials are shown in the table below
Q1. The electrons transferred in redox reactions can be used by electrochemical cells to provide energy. Some electrode half-equations and their standard electrode potentials are shown in the table below.
Page 2. Q1.Which of these species is the best reducing agent? A Cl 2 C I 2
Q1.Which of these species is the best reducing agent? l 2 l I 2 I Q2.Which of these substances reacts most rapidly to produce a silver halide precipitate with acidified silver nitrate? H 3r H 3l H 3F H
GraspIT AQA GCSE Quantitative changes
A. Chemical measurements part 1 Chemical changes and conservation of mass 1. A piece of magnesium was heated in a crucible. a) Write a balance equation to show how the magnesium reacts with oxygen. (2)
Chemistry 101 Chapter 4 STOICHIOMETRY
STOICHIOMETRY Stoichiometry is the quantitative relationship between the reactants and products in a balanced chemical equation. Stoichiometry allows chemists to predict how much of a reactant is necessary
Stoichiometry Chapter 9 Practice Assessment B
NAME Hour Date Stoichiometry Chapter 9 Practice Assessment B Objective 1: Interpret balanced chemical equations in terms of interacting moles, representative particles, masses, and gas volume at STP. Directions:
flame 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)
Types of Reactions: Reactions
1 Reactions On the A.P. Test there will be one question (question #4) that will say: Give the formulas to show the reactants and the products for the following chemical reactions. Each occurs in aqueous
CHEM 13 NEWS EXAM Answers
HM 13 NWS XM 2013 - nswers 1 Which of the following is most similar in its properties to element 12? element 4 element 10 4 Of the following compounds, which one contains nitrogen in an oxidation state
Chapter 5 Chemical Reactions
Chapter 5 Chemical Reactions 5.1 Chemical Equations A chemical equation shows the chemical change taking place. The state of each substance is written in parentheses after the formula: s for solids, l
UNIT (4) CALCULATIONS AND CHEMICAL REACTIONS
UNIT (4) CALCULATIONS AND CHEMICAL REACTIONS 4.1 Formula Masses Recall that the decimal number written under the symbol of the element in the periodic table is the atomic mass of the element. Atomic mass
11/3/09. Aqueous Solubility of Compounds. Aqueous Solubility of Ionic Compounds. Aqueous Solubility of Ionic Compounds
Aqueous Solubility of Compounds Not all compounds dissolve in water. Solubility varies from compound to compound. Chapter 5: Chemical Reactions Soluble ionic compounds dissociate. Ions are solvated Most
... [1] (ii) Draw a dot-and-cross diagram to show the bonding in NH 3
![... [1] (ii) Draw a dot-and-cross diagram to show the bonding in NH 3](/thumbs/76/73434679.jpg "... [1] (ii) Draw a dot-and-cross diagram to show the bonding in NH 3")
1 Chemists have developed models for bonding and structure which are used to explain different properties. (a) Ammonia, NH 3, is a covalent compound. Explain what is meant by a covalent bond. Draw a dot-and-cross
5 Oxidation and reduction: redox (Topic 3)
Page 91 Questions 1 a) Cr 2+ to Cr 3+ is oxidation because the Cr 2+ ion loses an electron to become a Cr 3+ ion. b) HI to I 2 is oxidation. The I ion in HI loses an electron to become an I atom, which
Balancing Equations Notes
. Unit 9 Chemical Equations and Reactions What is a Chemical Equation? A is a written representation of the process that occurs in a chemical reaction. A chemical equation is written with the (starting
Name CHEMISTRY / / Oxide Reactions & Net Ionic Reactions
Name CHEMISTRY / / Oxide Reactions & Net Ionic Reactions The first type of reactions we will look at today are reactions between an oxide (a compound with oxygen as its anion) and water. There are two
Chapter 4. Aqueous Reactions and Solution Stoichiometry
Sample Exercise 4.1 (p. 127) The diagram below represents an aqueous solution of one of the following compounds: MgCl 2, KCl, or K 2 SO 4. Which solution does it best represent? Practice Exercise 1 (4.1)
Redox Reactions, Chemical Cells and Electrolysis
Topic 5 Redox Reactions, Chemical Cells and Electrolysis Part A Unit-based exercise Unit 19 Chemical cells in daily life Fill in the blanks 1 chemical; electrical 2 electrolyte 3 voltmeter; multimeter
is more highly charged than Cl. is needed than Cl. (g) N 2 O 4 (g) 2NO 2, is negative. Hence the equilibrium constant, K p
1 The value of E cell indicates whether the cell reaction is thermodynamically feasible. Which of the following is a correct statement about E cell? E cell is directly proportional to the equilibrium constant.
Chapter 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
Ch 7 Chemical Reactions Study Guide Accelerated Chemistry SCANTRON
Ch 7 Chemical Reactions Study Guide Accelerated Chemistry SCANTRON Name /80 TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false. Correct the False statments by changing the
(a) Explain what is happening in stages 1 and 2. (3) (b) (i) Identify the products formed in stages 5, 6 and 7.
1 Hydrated magnesium nitrate, Mg(NO 3 ) 2.6H 2 O, is heated in a boiling tube and the following observations are made. Stage 1 Stage 2 Stage 3 Stage 4 Stage 5 Stage 6 Stage 7 The white solid forms a clear,
Indicators of chemical reactions
Indicators of chemical reactions Emission of light or heat Formation of a gas Formation of a precipitate Color change Emission of odor All chemical reactions: have two parts Reactants - the substances
1. What is the mass percent of sulfur in Al 2 (SO 4 ) 3? A % C % B % D %
1. What is the mass percent of sulfur in Al 2 (SO 4 ) 3? A. 9.372 % C. 28.12 % B. 21.38 % D. 42.73 % 2. How many grams of phosphorus are in 35.70 g of P 2 O 5? A. 6.359 g C. 15.58 g B. 23.37 g D. 31.16
Name AP CHEM / / Collected Essays Chapter 17
Name AP CHEM / / Collected Essays Chapter 17 1980 - #2 M(s) + Cu 2+ (aq) M 2+ (aq) + Cu(s) For the reaction above, E = 0.740 volt at 25 C. (a) Determine the standard electrode potential for the reaction