Chem. 1B Midterm 2 Version A
|
|
- Samantha Reeves
- 5 years ago
- Views:
Transcription
1 Chem. B Midterm Version A Name Student Number All wor must be shown on the eam for partial credit. Points will be taen off for incorrect or no units and for the incorrect number of significant figures. Calculators are allowed. On short answer problems you must show your wor in order to receive credit for the problem. If your cell phone goes off during the eam you will have your eam removed from you. Fundamentals (of 0 possible) Problem (of possible) Problem (of possible) Problem (of 6 possible) Multiple Choice (of 0 possible) Midterm Total (of 00 possible)
2 Fundamental Questions Each of these fundamental chemistry questions is worth 5 points. You must show wor to get credit. Little to no partial credit will be rewarded. Mae sure to report answers in the correct number of significant figures and with the proper units. ) 5 pts For the following equation CH OH(l) + O (g) CO (g) + H O(l) What is oidized and what is the reducing agent? C - +4 lost electrons CH OH Reducing Agent C was oidized ) 5 pts Given the following reaction mechanism: NO Cl ClO + N O +ClO N O + ClO NO + NOCl NOCl + ClO NO +Cl Write the overall reaction. Identify the intermediate(s) if any in the reaction. Identify the catalyst(s) if any in the reaction. Overall Reaction NO Cl NO + Cl Intermediates N O, ClO, NOCl, and ClO Catalysts None ) 5 pts What is the nd half life for a second order reaction with = s and an initial concentration of M. st ½ life [ o = M nd ½ life [ o = 6 M nd Order Reaction t A A s.0m t s [= 6.0 M [=.0 M t 6.0M
3 4) 5 pts What is E cell for the following reaction at 5 C? I (s)+ Fe(s)Fe + (aq, 0.0M) + I - (aq, 0.0 M) RT E E lnq nf Fe Fe + + e - E =0.44 V I + e - I - Fe + I Fe + + I - Q Fe I E 0.98V E = 0.54 V E =0.98 V J 8.45 K 98K C 96,485 ln 0.0M 0.0M.0V 5) 5 pts Write the balanced equation and determine the cell potential for Pt(s) Cr + (aq),cr + (aq) Cu + (aq) Cu(s) Assume standard conditions. Mae sure to include the states in the balanced equation. V Anode (Cr + Cr + + e - ) E = 0.50 V Cathode Cu + +e - Cu E = 0.4 V Cr + (aq)+cu + (aq) Cr + (aq)+cu(s) E =0.84 6) 5 pts What is K for the following reaction at 5 C? Sn 4+ (aq) + Ag(s) Sn + (aq) + Ag + (aq) E =0.65 V Are there more reactants or products at equilibrium? Sn 4+ + e - Sn + (AgAg + + e - ) RT E lnk nf J 8.45 K 98K 0.65V 96,485 ln K 5 K 9.70 More products C ln K
4 Short Answer Questions Each of the following short answer questions are worth the noted points. Partial credit will be given. Mae sure to show wor, report answers to the correct number of significant figures and use the proper units. ) pts A metal forms the salt MCl. Electrolysis of the ten salt with a current of A for 6.6 h produced.00 g of the metal. What is the ar mass of the metal? Determine the es of electrons It n F 60min 60s t 6.6h 900s h min It 0.700A900s n 0.7 C F 96,485 Because M forms the compound MCl the ion that M forms is M + M + + e - M Determine the es of M M 0.7e M e Determine ar mass M.00g M 5.0 g To get full credit for this question you must have shown your wor completely: 4 points for calculating the es of electrons. In order to convert between es of electrons and es of M you needed to have an equation that allowed you to get a e to e ratio M + +e - M. Putting is not showing your wor. I have no idea where these numbers are coming from or what you are converting between. Therefore: points for realizing M formed the ion M + (If you did not put M + on your paper you could only get 4 points even if you got the correct answer. In order to be able to construct the ½ reaction needed to mae the e to e conversion you needed to now the charge on the M) points for the following equation M + +e - M (If you did not put M + +e - M on your paper you could only get 7 points even if you got the correct answer because in order to now the e to e conversion factor you needed to now the ½ reaction) points for the correct answer. 4
5 ) pts The reaction 5Br - (aq) + BrO - (aq) + 6H + (aq) Br (l) + H O(l) Is epected to obey the mechanism BrO - (aq) + H + (aq) HBrO (aq) (forward)/ - (bacward) Fast Equilibrium HBrO (aq) + H + (aq) H BrO + (aq) Fast Equilibrium (forward)/ - (bacward) Br - (aq) + H BrO + (aq) (Br-BrO )(aq) + H O(l) Slow (Br-BrO )(aq) + 4H + (aq) + 4Br - (aq) products Fast 4 Write the rate law for this reaction and show what the overall is in terms of elementary reaction s. rate Br HBrO H BrO + is an intermediate therefore, needs to be eliminated from the rate law. Use equilibrium to eliminate the intermediate. HBrO H H BrO HBrO H H BrO Br HBrO H Br H BrO rate HBrO is an intermediate therefore, needs to be eliminated from the rate law. Use equilibrium to eliminate the intermediate. BrO H HBrO BrO H HBrO rate rate Br HBrO H Br BrO H Br BrO H 5
6 a) 0 pts The following data were obtained for the reaction A+B products [ o (M) [B] o (M) Initial Rate( ) What is the rate law? y rate [ [ B] Determine reaction order with respect to A Use eperiments and M log 0.0M y 0.00M 0.0M M 0.00M 0.5 log y rate [ [ B] Determine reaction order with respect to B Use eperiments and When the [B] double and the concentration of [ remains the same the rate doubles. Therefore, reaction is st order with respect to [B]..50 rate [ [ B] y b) 6 pts If the rate law was determined to be. rate [ [ B] And the following data was collected [ o (M) [B] o (M) Initial Rate( ) What is? Remember to include units.. rate [ [ B] L s. 6
7 Multiple Choice Questions Each of the following multiple choice questions are worth 5 points. Your answers need to be filled in on the Scantron provided. Note: Your Scantrons will not be returned to you, therefore, for your records, you may want to mar your answers on this sheet. On the Scantron you need to fill in your perm number, test version, and name. Failure to do any of these things will result in the loss of point. Your perm number is placed and bubbled in under the ID number. Do not sip boes or put in a hyphen. In addition, leave bubbles blan under any unused boes. The version number (A) is bubbled in under the test form. Use the following to answer question : For the reaction a A products, select the reaction order(s) that best fit(s) the observations.. A plot of [ vs. t gives a straight line. A) first order in A B) second order in A C) zero order in A D) all of these E) none of these. The reaction profile for the mechanism NO (g) + F (g) NO F(g) + F(g) slow F(g) + NO (g) NO F(g) fast shows A) two maima, the second maimum being the higher. B) one maimum for the second step. C) two maima, both the same height. D) two maima, the first maimum being the higher.. For a reaction in a voltaic cell, both H and S are positive. Which of the following statements is true? A) G > 0 for all temperatures. B) E cell will increase with an increase in temperature. C) E cell will decrease with an increase in temperature. D) E cell will not change when the temperature increases. E) None of the above statements is true. 7
8 4. All of the following statements with respect to the effect of a catalyst on a reaction are true ecept: A) A catalyst speeds up a reaction by providing an alternate pathway for the reaction. B) When a reaction is catalyzed, both forward and reverse reactions are accelerated. C) When a catalyst speeds up a reaction, the rate law stays the same. D) A catalyst provides a lower activation energy for the reaction. E) A catalyst has no effect on the equilibrium composition of the reaction. 5. A concentration cell is constructed using two Ni electrodes with Ni + concentrations of.6 M (cathode) and M (anode) in the two half-cells. The reduction potential of Ni + is 0. V. Calculate the potential of the cell at 5 C. A) +0.0 V B) +0. V C) 0.0 V D) V E) 0. V 6. True of False. This (electrolysis) is when an electric current catalyzes a reaction. A) True B) False 8
Chem. 1B Midterm 2 Version B Feb. 24, 2016
Chem. B Midterm 2 Version B Feb. 24, 206 First initial of last name Name: Print Neatly. You will lose point if I cannot read your name or perm number. Perm Number: All work must be shown on the exam for
More informationChem. 1B Midterm 2 Version A
Chem. 1B Midterm 2 Version A First letter of last name Name Student Number All work must be shown on the exam for partial credit. Points will be taken off for incorrect or no units. Calculators are allowed.
More informationChem. 1B Final Practice Test 2 Solutions
First letter of last name Chem. 1B Final Practice Test 2 Solutions Name Print Neatly. You will lose 1 point if I cannot read your name or perm number. Student Number If you are sitting next to someone
More informationChem. 1B Midterm 2 Version B March 3, 2017
First initial of last name Chem. 1B Midterm 2 Version B March 3, 2017 Name: Print Neatly. You will lose 1 point if I cannot read your name or perm number. Perm Number: All work must be shown on the exam
More informationChem. 1B Midterm 2 Version A March 3, 2017
First initial of last name Chem. 1B Midterm 2 Version A March 3, 2017 Name: Print Neatly. You will lose 1 point if I cannot read your name or perm number. Perm Number: All work must be shown on the exam
More informationChem. 1B Midterm 1 Practice Test 1
First letter of last name Chem. 1B Midterm 1 Practice Test 1 Name Print Neatly. You will lose 1 point if I cannot read your name or perm number. Student Number If you are sitting next to someone with the
More informationChem. 1B Final Practice
Chem. 1B Final Practice Name Student Number All work must be shown on the exam for partial credit. Points will be taken off for incorrect or no units and for the incorrect number of significant figures.
More informationChem. 1A Midterm 2 Version A
Chem. 1A Midterm 2 Version A Name Student Number All work must be shown on the exam for partial credit. Points will be taken off for incorrect or no units and for the incorrect number of significant figures.
More informationChem. 1B Midterm 1 Practice Test 2
First letter of last name Chem. 1B Midterm 1 Practice Test 2 Name Print Neatly. You will lose 1 point if I cannot read your name or perm number. Student Number If you are sitting next to someone with the
More informationChem. 1A Midterm 1 Version A Practice Test 2
Chem. 1A Midterm 1 Version A Practice Test 2 Name Student Number All work must be shown on the exam for partial credit. Points will be taken off for incorrect or no units. Calculators are allowed. Cell
More informationChem. 1B Final Practice First letter of last name
Chem. 1B Final Practice First letter of last name Name Student Number All work must be shown on the exam for partial credit. Points will be taken off for incorrect or no units. Calculators are allowed.
More informationChem. 1C Midterm 1 Practice Test 2
Chem. 1C Midterm 1 Practice Test 2 First initial of last name Name Student Number All work must be shown on the exam for partial credit. Points will be taken off for incorrect or no units. Calculators
More information25. A typical galvanic cell diagram is:
Unit VI(6)-III: Electrochemistry Chapter 17 Assigned Problems Answers Exercises Galvanic Cells, Cell Potentials, Standard Reduction Potentials, and Free Energy 25. A typical galvanic cell diagram is: The
More informationChem. 1A Midterm 1 Version A October 14, 2016
Chem. 1A Midterm 1 Version A October 14, 2016 First initial of last name Name: Print Neatly. You will lose 1 point if I cannot read your name or perm number. Perm Number: All work must be shown on the
More informationChem. 1A Midterm 1 Version B October 14, 2016
Chem. 1A Midterm 1 Version B October 14, 2016 First initial of last name Name: Print Neatly. You will lose 1 point if I cannot read your name or perm number. Perm Number: All work must be shown on the
More informationThe relevant half cell reactions and potentials are: Calculate the equilibrium constant, K, for the reaction at 25 C. lnk
CHEM1405 2004-J-3 June 2004 Calculate the initial cell potential for the following unbalanced reaction at 25 C from the standard electrode potentials. Assume the concentration of all species is initially
More informationChem. 1A Final. Name. Student Number
Chem. 1A Final Name Student Number All work must be shown on the exam for partial credit. Points will be taken off for incorrect or no units. Calculators are allowed. Cell phones may not be used for calculators.
More informationChem. 1B Midterm 1 Version A February 3, 2017
First initial of last name Chem. 1B Midterm 1 Version A February 3, 2017 Name: Print Neatly. You will lose 1 point if I cannot read your name or perm number. Perm Number: All work must be shown on the
More informationChem Midterm 4 May 14, 2009
Chem. 101 - Midterm 4 May 14, 009 Name All work must be shown on the exam for partial credit. Points will be taken off for incorrect or no units and for the incorrect number of significant figures. Only
More informationChem. 1B Midterm 1 Version B February 1, 2019
First initial of last name Chem. 1B Midterm 1 Version B February 1, 2019 Name: Print Neatly. You will lose 1 point if I cannot read your name or perm number. Perm Number: All work must be shown on the
More informationBubble in A, B or C as the test form code at the top right of your answer sheet. Bubble in your Section Number also. VERSION X
CHM 2046 Practice Exam 3 Bubble in A, B or C as the test form code at the top right of your answer sheet. Bubble in your Section Number also. VERSION X 1. A reaction has ΔH = -75.0 kj and ΔS = -245 J/K.
More informationChem 1C Midterm 2 Practice Test 1
Chem 1C Midterm 2 Practice Test 1 First initial of last name Name Perm Number All work must be shown on the exam for partial credit. Points will be taken off for incorrect or missing units. Calculators
More informationChapter 18 problems (with solutions)
Chapter 18 problems (with solutions) 1) Assign oxidation numbers for the following species (for review see section 9.4) a) H2SO3 H = +1 S = +4 O = -2 b) Ca(ClO3)2 Ca = +2 Cl = +5 O = -2 c) C2H4 C = -2
More informationChem. 1B Midterm 1 Version B February 3, 2017
First initial of last name Chem. 1B Midterm 1 Version B February 3, 2017 Name: Print Neatly. You will lose 1 point if I cannot read your name or perm number. Perm Number: All work must be shown on the
More informationChemistry 102 Chapter 19 OXIDATION-REDUCTION REACTIONS
OXIDATION-REDUCTION REACTIONS Some of the most important reaction in chemistry are oxidation-reduction (redox) reactions. In these reactions, electrons transfer from one reactant to the other. The rusting
More informationChem. 1A Midterm 1 Version A October 20, 2017
First initial of last name Chem. 1A Midterm 1 Version A October 20, 2017 Name: Print Neatly. You will lose 1 point if I cannot read your name or perm number. Perm Number: All work must be shown on the
More informationChem. 1A Midterm 1 Version B October 20, 2017
First initial of last name Chem. 1A Midterm 1 Version B October 20, 2017 Name: Print Neatly. You will lose 1 point if I cannot read your name or perm number. Perm Number: All work must be shown on the
More informationChem. 1B Midterm 1 Version A February 9, 2018
First initial of last name Chem. 1B Midterm 1 Version A February 9, 2018 Name: Print Neatly. You will lose 1 point if I cannot read your name or perm number. Perm Number: All work must be shown on the
More informationCh 11 Practice Problems
Ch 11 Practice Problems 1. How many electrons are transferred in the following reaction? 2Cr 2O 7 2- + 14H + + 6Cl 2Cr 3+ + 3Cl 2 + 7H 2O A) 2 B) 4 C) 6 D) 8 2. Which metal, Al or Ni, could reduce Zn 2+
More informationChem. 6C Midterm 2 Version A November 13, 2007
Chem. 6C Midterm 2 Version A November 13, 2007 Name Student Number TA Name Section Time All work must be shown on the exam for partial credit. Points will be taken off for incorrect or no units. Non graphing
More informationOxidation-reduction (redox) reactions
Oxidation-reduction (redox) reactions Reactions in which there are changes in oxidation state (oxidation number) between reactants and products 2 MnO 4- + 10 Br - + 16 H + 2 Mn 2+ + 5 Br 2 + 8 H 2 O One
More informationOxidation refers to any process in which the oxidation number of an atom becomes more positive
Lecture Notes 3 rd Series: Electrochemistry Oxidation number or states When atoms gain or lose electrons they are said to change their oxidation number or oxidation state. If an element has gained electrons
More informationChem. 6C Midterm 2 Version C November 13, 2007
Chem. 6C Midterm 2 Version C November 13, 2007 Name Student Number TA Name Section Time All work must be shown on the exam for partial credit. Points will be taken off for incorrect or no units. Non graphing
More informationChem. 1A Final Practice Test 2
Chem. 1A Final Practice Test 2 All work must be shown on the exam for partial credit. Points will be taken off for incorrect or missing units. Calculators are allowed. Cell phones may not be used as calculators.
More informationChem. 1C Midterm 2 Version B May 17, 2017
First initial of last name Chem. 1C Midterm 2 Version B May 17, 2017 Name: rint Neatly. You will lose 1 point if I cannot read your name or perm number. erm Number: All work must be shown on the exam for
More informationChem. 1C Midterm 1 Version B April 26, 2017
First initial of last name Chem. C Midterm Version B April 6, 07 Name: Print Neatly. You will lose point if I cannot read your name or perm number. Perm Number: All work must be shown on the exam for partial
More informationChem. 1C Midterm 1 Version A April 26, 2017
First initial of last name Chem. C Midterm Version A April 6, 07 Name: Print Neatly. You will lose point if I cannot read your name or perm number. Perm Number: All work must be shown on the exam for partial
More informationCHEMISTRY 13 Electrochemistry Supplementary Problems
1. When the redox equation CHEMISTRY 13 Electrochemistry Supplementary Problems MnO 4 (aq) + H + (aq) + H 3 AsO 3 (aq) Mn 2+ (aq) + H 3 AsO 4 (aq) + H 2 O(l) is properly balanced, the coefficients will
More informationchem 128 exam two march 02, 2006 dr. rod wolfcall schoonover If you do not finish by 01:15 pm, please remain seated until the end of the period.
chem 128 exam two march 02, 2006 dr. rod wolfcall schoonover name: This examination packet contains 07 pages, composed of 5 pages of questions, this cover sheet and a sheet of possibly useful information
More informationElectrochemistry. Remember from CHM151 G E R L E O 6/24/2014. A redox reaction in one in which electrons are transferred.
Electrochemistry Remember from CHM151 A redox reaction in one in which electrons are transferred Reduction Oxidation For example: L E O ose lectrons xidation G E R ain lectrons eduction We can determine
More informationChem. 1B Midterm 1 Version A Jan. 29, 2016
Chem. 1B Midterm 1 Version A Jan. 29, 2016 First initial of last name Name: Print Neatly. You will lose 1 point if I cannot read your name or perm number. Perm Number: All work must be shown on the exam
More informationPractice 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
More informationGENERAL CHEMISTRY II CHM202 Unit 4 Practice Test
GENERAL CHEMISTRY II CHM202 Unit 4 Practice Test This test is intended to help you get acquainted with the types of questions you will be asked on the Unit Test administered at the end of the unit. The
More informationChem. 1A Midterm 1 Version A October 19, 2018
First initial of last name Chem. 1A Midterm 1 Version A October 19, 2018 Name: Print Neatly. You will lose 1 point if I cannot read your name or perm number. Perm Number: All work must be shown on the
More informationCHEM J-8 June /01(a)
CHEM1001 2012-J-8 June 2012 22/01(a) A galvanic cell has the following cell reaction: D(s) + 2Zn 2+ (aq) 2Zn(s) + D 4+ (aq) Write the overall cell reaction in shorthand cell notation. E = 0.18 V 8 D(s)
More informationChem. 1A Midterm 2 Version A November 9, 2018
First initial of last name Chem. 1A Midterm 2 Version A November 9, 2018 Name: Print Neatly. You will lose 1 point if I cannot read your name or perm number. Perm Number: All work must be shown on the
More informationCHEM J-14 June 2014
CHEM1101 2014-J-14 June 2014 An electrochemical cell consists of an Fe 2+ /Fe half cell with unknown [Fe 2+ ] and a Sn 2+ /Sn half-cell with [Sn 2+ ] = 1.10 M. The electromotive force (electrical potential)
More informationChem. 1C Midterm 2 Version B May 11, 2016
Chem. 1C Midterm 2 Version B May 11, 2016 First initial of last name Name: Print Neatly. You will lose 1 point if I cannot read your name or perm number. Perm Number: All work must be shown on the exam
More informationChem. 1A Final Practice Test 1
Chem. 1A Final Practice Test 1 All work must be shown on the exam for partial credit. Points will be taken off for incorrect or no units. Calculators are allowed. Cell phones may not be used for calculators.
More informationHomework #4 Chapter 15 Chemical Kinetics. Therefore, k depends only on temperature. The rate of the reaction depends on all of these items (a d).
Homework #4 Chapter 5 Chemical Kinetics 8. Arrhenius Equation Therefore, k depends only on temperature. The rate of the reaction depends on all of these items (a d). 4. a) d) b) c) e) 5. Rate has units
More informationCHM 2046 Practice Final Exam
CHM 2046 Practice Final Exam IMPORTANT: Bubble in A, B or C as the test form code at the top right of your answer sheet AND also bubble in your Section Number and UFID on the left side of your answer sheet.
More informationChapter 19: Oxidation - Reduction Reactions
Chapter 19: Oxidation - Reduction Reactions 19-1 Oxidation and Reduction I. Oxidation States A. The oxidation rules (as summarized by Mr. Allan) 1. In compounds, hydrogen has an oxidation # of +1. In compounds,
More informationOxidation State Short Cuts
Oxidation State Short Cuts The oxidation state of an atom in its elemental state is zero The sum of atomic oxidation states = total charge on an ion or molecule The oxidation state of F is always -1 (except
More informationChem. 1A Midterm 2 Version B November 9, 2016
Chem. 1A Midterm 2 ersion B November 9, 2016 First initial of last name Name: Print Neatly. You will lose 1 point if I cannot read your name or perm number. Perm Number: All work must be shown on the exam
More informationChem. 1A Midterm 2 Version A November 9, 2016
Chem. 1A Midterm 2 ersion A November 9, 2016 First initial of last name Name: Print Neatly. You will lose 1 point if I cannot read your name or perm number. Perm Number: All work must be shown on the exam
More informationElectrochemical Cells
CH302 LaBrake and Vanden Bout Electrochemical Cells Experimental Observations of Electrochemical Cells 1. Consider the voltaic cell that contains standard Co 2+ /Co and Au 3+ /Au electrodes. The following
More informationCh 20 Electrochemistry: the study of the relationships between electricity and chemical reactions.
Ch 20 Electrochemistry: the study of the relationships between electricity and chemical reactions. In electrochemical reactions, electrons are transferred from one species to another. Learning goals and
More informationCHEMISTRY - CLUTCH CH.18 - ELECTROCHEMISTRY.
!! www.clutchprep.com CONCEPT: OXIDATION-REDUCTION REACTIONS Chemists use some important terminology to describe the movement of electrons. In reactions we have the movement of electrons from one reactant
More informationMULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
A.P. Chemistry Practice Test - Ch. 17: Electochemistry MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) The gain of electrons by an element is called.
More informationOxidation (oxidized): the loss of one or more electrons. Reduction (reduced): the gain of one or more electrons
1 of 13 interesting links: Battery Chemistry Tutorial at http://www.powerstream.com/batteryfaq.html Duracell Procell: Battery Chemistry at http://www.duracell.com/procell/chemistries /default.asp I. Oxidation
More informationAnnouncements. Comprehensive Final Exam: March 24 7:30AM - 9:30 C114 2,9,10,11,13,17,22,29,31,38,40,44,46,50,53,58,62,64,65,70, 72,73,82,85,87
Announcements Exam 3 March 17 Comprehensive Final Exam: March 24 7:30AM - 9:30 C114 Problems Chapter 21: 2,9,10,11,13,17,22,29,31,38,40,44,46,50,53,58,62,64,65,70, 72,73,82,85,87 Up to but not including
More information17.1 Redox Chemistry Revisited
Chapter Outline 17.1 Redox Chemistry Revisited 17.2 Electrochemical Cells 17.3 Standard Potentials 17.4 Chemical Energy and Electrical Work 17.5 A Reference Point: The Standard Hydrogen Electrode 17.6
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 informationChem. 1A Midterm 1 Practice Test 2
Chem. 1A Midterm 1 Practice Test 2 All work must be shown on the exam for partial credit. Points will be taken off for incorrect or missing units. Calculators are allowed. Cell phones may not be used as
More informationELECTROCHEMISTRY OXIDATION-REDUCTION
ELECTROCHEMISTRY Electrochemistry involves the relationship between electrical energy and chemical energy. OXIDATION-REDUCTION REACTIONS SPONTANEOUS REACTIONS Can extract electrical energy from these.
More informationChem 4501 Introduction to Thermodynamics, 3 Credits Kinetics, and Statistical Mechanics. Fall Semester Homework Problem Set Number 12 Solutions
Chem 4501 Introduction to Thermodynamics, 3 Credits Kinetics, and Statistical Mechanics Fall Semester 017 Homework Problem Set Number 1 Solutions 1. (Based on McQuarrie and Simon, 13-1.) Write balanced
More informationOxidation-Reduction Review. Electrochemistry. Oxidation-Reduction Reactions. Oxidation-Reduction Reactions. Sample Problem.
1 Electrochemistry Oxidation-Reduction Review Topics Covered Oxidation-reduction reactions Balancing oxidationreduction equations Voltaic cells Cell EMF Spontaneity of redox reactions Batteries Electrolysis
More informationCHEM J-12 June 2013
CHEM1101 2013-J-12 June 2013 In concentration cells no net chemical conversion occurs, however a measurable voltage is present between the two half-cells. Explain how the voltage is produced. 2 In concentration
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 informationChapter 18 Electrochemistry. Electrochemical Cells
Chapter 18 Electrochemistry Chapter 18 1 Electrochemical Cells Electrochemical Cells are of two basic types: Galvanic Cells a spontaneous chemical reaction generates an electric current Electrolytic Cells
More informationName Period Date. Ch. 19: Oxidation-Reduction Reactions Homework
Name Period Date Ch. 19: OxidationReduction Reactions Homework Answer each of the following questions in as much detail as you can. Be sure to show all your work for any calculations and follow all rules
More informationGeneral Chemistry Exam 3 Chem 211 Section 03, Spring 2017
General Chemistry Exam 3 Chem 211 Section 03, Spring 2017 Exam Information You have 50 minutes to complete this exam. Be sure to put your name on the next page. Please ask for clarification of questions
More informationElectrochemistry. A. Na B. Ba C. S D. N E. Al. 2. What is the oxidation state of Xe in XeO 4? A +8 B +6 C +4 D +2 E 0
Electrochemistry 1. Element M reacts with oxygen to from an oxide with the formula MO. When MO is dissolved in water, the resulting solution is basic. Element M is most likely: A. Na B. Ba C. S D. N E.
More informationChapter 20. Electrochemistry. Chapter 20 Problems. Electrochemistry 7/3/2012. Problems 15, 17, 19, 23, 27, 29, 33, 39, 59
Chemistry, The Central Science, 11th edition Theodore L. Brown; H. Eugene LeMay, Jr.; and Bruce E. Bursten Chapter 20 John D. Bookstaver St. Charles Community College Cottleville, MO Chapter 20 Problems
More informationMULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Exam of General Chemistry :ch.18-19 Name ID MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) When the following half-reaction is balanced, the number
More informationElectrochemistry. Outline
Electrochemistry Outline 1. Oxidation Numbers 2. Voltaic Cells 3. Calculating emf or Standard Cell Potential using Half-Reactions 4. Relationships to Thermo, Equilibrium, and Q 5. Stoichiometry 6. Balancing
More informationBCIT Winter Chem Final Exam
BCIT Winter 2017 Chem 0012 Final Exam Name: Attempt all questions in this exam. Read each question carefully and give a complete answer in the space provided. Part marks given for wrong answers with partially
More informationSample Exercise 20.2 Practice Exercise 1 with feedback
Homework Chapter 20 Due: 11:59pm on Wednesday, November 16, 2016 You will receive no credit for items you complete after the assignment is due. Grading Policy Sample Exercise 20.2 Practice Exercise 1 with
More informationChem. 1A Midterm 2 Practice Test 2
Chem. 1A Midterm 2 Practice Test 2 All work must be shown on the exam for partial credit. Points will be taken off for incorrect or missing units. Calculators are allowed. Cell phones may not be used as
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 informationUnit B: Electrochemical Changes Solutions
Unit B: Electrochemical Changes Solutions Question 1 Assign oxidation numbers and identify the reducing agent (RA) and oxidizing agent (OA): 0 0 2 Na(g) + Cl 2 (g) 2 RA OA It is the OA that undergoes reduction
More informationChemistry 112 Name Exam III Form A Section April 2,
Chemistry 112 Name Exam III Form A Section April 2, 2013 email IMPORTANT: On the scantron (answer sheet), you MUST clearly fill your name, your student number, section number, and test form (white cover
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 informationChemistry 30 Review Test 3 Redox and Electrochemistry /55
Chemistry 30 Review Test 3 Redox and Electrochemistry /55 Part I Multiple choice / Numerical Response Answer the following multiple choice questions on the scantron sheet. Answer the numerical response
More informationChapter 14 Chemical Kinetics
Chapter 14 Chemical Kinetics Thermodynamics tells us what can happen and how far towards completion a reaction will proceed. Kinetics tells us how fast the reaction will go. Study of rates of reactions
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 112, Fall 2006, Section 1 (Garman and Heuck) Final Exam A (100 points) 19 Dec 2006
Chemistry 112, Fall 2006, Section 1 (Garman and Heuck) (100 points) 19 Dec 2006 Name: YOU MUST: Put your name and student ID on the bubble sheet correctly. Put the exam version on the bubble sheet on the
More informationElectrochemistry. Chapter 18. Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
Electrochemistry Chapter 18 Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 1 Electrochemical processes are oxidation-reduction reactions in which: the energy
More information40S CHEMISTRY FINAL EXAM PROBLEM REVIEW SHEET:
40S CHEMISTRY FINAL EXAM PROBLEM REVIEW SHEET: **THIS IS NOT A COMPLETE REVIEW. CONTINUE TO READ ALL COURSE NOTES, GO OVER ALL WORKSHEETS, HANDOUTS, AND THE MID-TERM EXAM TO BE BETTER PREPARED. To prepare
More informationCHEM Chapter 14. Chemical Kinetics (Homework) Ky40
CHEM 1412. Chapter 14. Chemical Kinetics (Homework) Ky40 1. Chlorine dioxide reacts in basic water to form chlorite and chlorate according to the following chemical equation: 2ClO 2 (aq) + 2OH (aq) ClO
More informationCHEM J-14 June 2014
CHEM1101 2014-J-14 June 2014 An electrochemical cell consists of an Fe 2+ /Fe half cell with unknown [Fe 2+ ] and a Sn 2+ /Sn half-cell with [Sn 2+ ] = 1.10 M. The electromotive force (electrical potential)
More informationChem 1412 SU06 Exam 4
Chem 1412 SU06 Exam 4 Student: 1. Which of the following is necessary for a process to be spontaneous? A. H sys < 0 B. S sys > 0 C. S surr < 0 D. S univ > 0 E. G sys = 0 2. Which of the following is always
More informationElectrochem: It s Got Potential!
Electrochem: It s Got Potential! Presented by: Denise DeMartino Westlake High School, Eanes ISD Pre-AP, AP, and Advanced Placement are registered trademarks of the College Board, which was not involved
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 informationCHEMISTRY 1B Fall, 2015 EXAM 3 VERSION A KEY
CHEMISTR 1B Fall, 2015 EAM 3 VERSION A KE Use Scantron Form SC982 E and select the letter corresponding to the correct answer. Make sure to put your full name, lab section number, and exam version (under
More information+ 6S 2. O H + 2Cr S Which substance is the reducing agent in the reaction below? + 2H 2. Pb + PbO 2 SO 4
JASPERSE CHEM 160 PRACTICE TEST 4 VERSIN 1 Ch. 19 Electrochemistry Ch. 20 Nuclear Chemistry Formulas: E cell =E reduction + E oxidation G = nfe cell (for kj, use F = 96.5) E cell = E [0.0592/n]log Q log
More information2. Balance the following reaction. How many electrons would be transferred?
JASPERSE CHEM 210 Ch. 19 Electrochemistry PRACTICE TEST 4 VERSION 3 Ch. 20 Nuclear Chemistry 1 Formulas: E cell =E reduction + E oxidation G = nfe cell (for kj, use F = 96.5) E cell = E [0.0592/n]log Q
More information02/05/09 Last 4 Digits of USC ID: Dr. Jessica Parr
Chemistry 05 B First Letter of PLEASE PRINT YOUR NAME IN BLOCK LETTERS Exam last Name Name: 02/05/09 Last 4 Digits of USC ID: Dr. Jessica Parr Lab TA s Name: Question Points Score Grader 2 2 9 3 9 4 2
More informationAnswer Key, Problem Set 9
Chemistry 122 Mines, Spring 2018 Answer Key, Problem Set 9 1. 19.44(c) (Also indicate the sign on each electrode, and show the flow of ions in the salt bridge.); 2. 19.46 (do this for all cells in 19.44);
More informationChapter 20 Electrochemistry
Chapter 20 Electrochemistry Electrochemical Cell Consists of electrodes which dip into an electrolyte & in which a chem. rxn. uses or generates an electric current Voltaic (Galvanic) Cell Spont. rxn. -
More information