THE “OFFICIAL” CHEMISTRY 12 REDOX &ELECTROCHEMISTRY STUDY .
THE “OFFICIAL” CHEMISTRY 12 REDOX &ELECTROCHEMISTRYSTUDY GUIDE1.2.3.4.5.DO ALL THE QUESTIONS in this booklet. These are actual Provincial Exam questions! Your own provincial exam and unit test willinclude questions similar to the ones in this booklet!RESIST THE URGE TO LOOK AT THE ANSWER KEY until you have given all the questions in the section your best effort. Don’t doone question, then look at the key, then do another and look at the key, and so on. Each time you look at one answer in the studyguide, your eye will notice other answers around them, and this will reduce the effectiveness of those questions in helping you to learn.LEARN FROM YOUR MISTAKES! If you get a question wrong, figure out why! If you are having difficulty, talk to your studypartner, or maybe phone someone in your Peer Tutoring group. Get together with group members or other students from classand work on these questions together. Explain how you got your answers to tough questions to others. In explaining yourself tosomeone else, you will learn the material better yourself (try it!) Ask your teacher to explain the questions to you during tutorial or afterschool. Your goal should be to get 100% on any Chemistry 12 multiple choice test- learning from your mistakes in this bookletwill really help you in your efforts to meet this goal!This is REALLY CRUCIAL: DO NOT mark the answer anywhere on the questions themselves. For example, do not circle any ofoptions A B C or D-instead use a different sheet of paper to place your answers on. By avoiding this urge, you can re-use this studyguide effectively again, when preparing for your final exam. In the box to the left, put an asterisk or small note to yourself to indicatethat you got the question wrong and need to come back to it. If you got the question correct initially, a check mark might be assurancethat you understand this type of question and therefore can concentrate on other questions that present a challenge to you.Check Off the STATUS box on the PRESCRIBED LEARNING OUTCOMES sheet. I have tried to organize the questions in theidentical sequence to which they appear on your Redox/Electrochemistry Prescribed Learning Outcome sheet. By doing this, you canbe confident that you know everything you need to know for both the UNIT EXAM and PROVINCIAL EXAM !TABLE OF CONTENTSINTRODUCTIONBALANCING REDOX EQUATIONSELECTROCHEMICAL CELLSCORROSIONELECTROLYTIC CELLSANSWER KEY1810171820INTRODUCTION1.2.S01Which one of the following is the strongest reducing agent?S01B. FA. IIn the reaction below:C. Cl-D. Br -the oxidizing agent isA. I 23.S014.S015.S01SAHOTAB. I-C. H D. ClO 3 -03 Electrochemistry Study Guide - Multiple Choice - Page 1 of 22
6.S017.S01An oxidizing agentA. loses electrons.C. loses mass in an operating electrochemical cell.electrochemical cell.B. decreases in oxidation number.D. acts as an anode in an operating8.S019.S0110.S0111.S0112.S0113.S02The oxidation state of S in S2O82- is:S02A. –2B. 7C. 8D. 1422As SO4 changes to SO3 , it is said that sulphur is being reduced since its oxidation number:14.When NO2 acts as a reducing agent, a possible product isC. N2O4D. N2O5A. NOB. N2OA. increases as electrons are lost.C. increases as electrons are gained.SAHOTAB. decreases as electrons are lost.D. decreases as electrons are gained.03 Electrochemistry Study Guide - Multiple Choice - Page 2 of 22
15.S0216.S0217.S0218.S0219.S0220.S0221.S02SAHOTA03 Electrochemistry Study Guide - Multiple Choice - Page 3 of 22
e has an oxidation number of 4 inC. Mn2O3D. Mn2O7A. MnOB. MnO2Consider the following equation:Electrons are lost in the reaction byA. Fe29.S03SAHOTAB. CuC. Fe 3D. Cu 2Electrons are lost by theA. reducing agent as it undergoes oxidation.B. reducing agent as it undergoes reduction.C. oxidizing agent as it undergoes oxidation.D. oxidizing agent as it undergoes reduction.03 Electrochemistry Study Guide - Multiple Choice - Page 4 of 22
30.S0331.S0332.S0333.S0334.S0335.S0336.S03SAHOTAIn an oxidation half-reaction there is aA. gain of protons.B. gain of electrons.C. loss of protons.D. loss of electrons.As an element is oxidized, its oxidation numberA. increases as electrons are lost.B. decreases as electrons are lost.C. increases as electrons are gained.D. decreases as electrons are gained.03 Electrochemistry Study Guide - Multiple Choice - Page 5 of 22
37.S0538.S0539.S0540.S0541.S0642.S06SAHOTAWhich of the following reactions is spontaneous at standard conditions?03 Electrochemistry Study Guide - Multiple Choice - Page 6 of 22
43.S0644.S0645.S0646.S0647.S0648.S06SAHOTA03 Electrochemistry Study Guide - Multiple Choice - Page 7 of 22
49.S0650.S0651.S0652.S0653.T0154.T01Which of the following 1 0 . M solutions will react spontaneously with lead?C. ZnCl2D. MgCl2A. KClB. CuCl2BALANCING REDOX EQUATIONSSAHOTA03 Electrochemistry Study Guide - Multiple Choice - Page 8 of 22
e concentration of Fe2 (aq) can be determined by a redox titration usingD. KBrO3 (acidic)A. KBrB. SnCl 2C. KmnO4 (basic)03 Electrochemistry Study Guide - Multiple Choice - Page 9 of 22
62.T0663.T06ELECTROCHEMICAL CELLS64.U01In an electrochemical cell, the cathodeA. is reduced.B. loses mass.C. is the reducing agent.65.U01In an operating electrochemical cell the function of a salt bridge is toA. allow hydrolysis to occur.B. allow a non-spontaneous reaction to occur.C. permit the migration of ions within the cell.D. transfer electrons from the cathode to the anode.66.U0267.U02SAHOTAD. is the site of reduction.03 Electrochemistry Study Guide - Multiple Choice - Page 10 of 22
68.U0269.U0270.U0271.U02SAHOTA03 Electrochemistry Study Guide - Multiple Choice - Page 11 of 22
72.U0373.U0374.U0375.U04SAHOTAThe direction of the electron flow isA. from Au to Pb through the wire.B. from Pb to Au through the wire.C. from Au to Pb through the salt bridge.D. from Pb to Au through the salt bridge.03 Electrochemistry Study Guide - Multiple Choice - Page 12 of 22
76.U0477.U0478.U0479.U0980.U05SAHOTAIn an operating zinc-copper electrochemical cell, the oxidizing agentA. loses electrons at the anode.electrons from the anions.B. loses electrons to the cations.C. gains electrons at the cathode.D. gains03 Electrochemistry Study Guide - Multiple Choice - Page 13 of 22
81.U0582.U0583.U05Which of the following occurs as the cell operates?A. Zinc electrode is reduced and increases in mass.B. Zinc electrode is reduced and decreases in mass.C. Zinc electrode is oxidized and increases in mass.D. Zinc electrode is oxidized and decreases in mass.84.U06SAHOTA03 Electrochemistry Study Guide - Multiple Choice - Page 14 of 22
85.U0786.U07Which of the following statements would be correct if the zinc half-cell had been chosen as thestandard instead of the hydrogen half-cell?A. The reduction potentials of all half-cells would remain unchanged.B. The reduction potentials of all half-cells would increase by 0.76 V.C. The reduction potentials of all-half-cells would have positive values.D. The reduction potential of the hydrogen half-cell would decrease by 0.76 V.87.U0888.U09SAHOTA03 Electrochemistry Study Guide - Multiple Choice - Page 15 of 22
89.U0990.91.U09As the cell operates, electrons flow towardA. the Pb electrode, where Pb is oxidized.B. the Cd electrode, where Cd is oxidized.C. the Pb electrode, where Pb2 is reduced.D. the Cd electrode, where Cd2 is reduced.The Ε value for the reduction of Cd2 isA. -0 40 .VB. -0 27 VC. 0.14 VD. 0.40 V92.U09The following reaction occurs in an electrochemical cell:The Ε for the cell isA. 0.40VB. 0.75V93.U0994.U1095.U1196.U11SAHOTAC. 1 .08VThe principal function of a fuel cell is toA. produce fuel.B. electrolyze fuel.D. 2.50VC. produce hydrogen.D. produce electricity.03 Electrochemistry Study Guide - Multiple Choice - Page 16 of 22
03.V04104.V04SAHOTAWhich of the following metals could be used to cathodically protect a sample of lead?A. ironB. goldC. silverD. copper03 Electrochemistry Study Guide - Multiple Choice - Page 17 of 22
ELECTROLYTIC CELLS105.D106.W01107.W04108.W04109.W04110.W04The process of applying an electric current through a cell to produce a chemical change is called:A. corrosion.B. ionization.C. hydrolysis.D. electrolysis.W04SAHOTA03 Electrochemistry Study Guide - Multiple Choice - Page 18 of 22
AHOTATo plate a nickel coin with copper,A. the nickel coin must be the cathode.C. the electrons must flow to the anode.B. the cathode must be made of copper.D. the solution must contain nickel ions.03 Electrochemistry Study Guide - Multiple Choice - Page 19 of 22
118.W08119.W08120.W08ANSWER KEY:SAHOTA03 Electrochemistry Study Guide - Multiple Choice - Page 20 of 22
BCCBDDBABA88.89.90.DCCACBDDBCBalancing Redox DDDCElectrochemical DBB91.92.93.94.95.96.97.Corrosion:98.99.SAHOTABA03 Electrochemistry Study Guide - Multiple Choice - Page 21 of 22
100.101.102.103.104.DABAAElectrolytic AA113.114.115.116.117.118.119.120.DDABBABD03 Electrochemistry Study Guide - Multiple Choice - Page 22 of 22
Your own provincial exam and unit test will include questions similar to the ones in this booklet! 2. RESIST THE. URGE. TO LOOK AT THE ANSWER KEY until you have given all the questions in the section your best effort. Don’t do one question, then look at the key, then do another and look at the key, and so on. Each time you look at one answer .
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ii. acid–base neutralization reactions iii. oxidation–reduction or redox reactions. Q.3. What are the important aspects of redox reactions? Ans: Almost every element participate in redox reactions. The important aspects of redox reactions are as follows: i. Large number of natural, biological and industrial processes involve redox reactions .
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CHAPTER 12: Redox Reactions . Goals of Chapter: - Understand redox reactions in detail - Review oxidation numbers - Learn electrochemical techniques Application of Redox Chemistry - extracting metals from ores, e.g. Need to learn to balance tricky redox reactions Cu 2CO 3(OH) 2(s) C(s) Æ2Cu(s) 2CO 2(g) H 2O(g .
Chính Văn.- Còn đức Thế tôn thì tuệ giác cực kỳ trong sạch 8: hiện hành bất nhị 9, đạt đến vô tướng 10, đứng vào chỗ đứng của các đức Thế tôn 11, thể hiện tính bình đẳng của các Ngài, đến chỗ không còn chướng ngại 12, giáo pháp không thể khuynh đảo, tâm thức không bị cản trở, cái được
