test3 - Version 001 Exam 3 vanden bout (51640) This...

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Version 001 – Exam 3 – vanden bout – (51640) 1 This print-out should have 31 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. Msci 21 1208 001 10.0 points Consider the Following electrode reactions: ±e 3+ + 1 e 2+ E 0 = +0 . 771 V I 2 + 2 e 2 I E 0 = 0 . 535 V What would be E 0 cell For the spontaneous reaction? 1. +1.007 V 2. +0.236 V 3. - 1.306 V 4. - 0.236 V 5. +1.306 V ChemPrin3e T12 59 002 10.0 points In the cell shown, A is a standard Zn 2+ | Zn electrode connected to a standard hydrogen electrode (SHE). + - Voltmeter Salt bridge H + A Pt(s) H 2 (g) IF the voltmeter reading is +0 . 76 V, which halF-reaction occurs in the leFt-hand cell com- partment? 1. Zn(s) Zn 2+ (aq) + 2 e 2. Zn(s) + 2 H + (aq) Zn 2+ (aq) + H 2 (g) 3. Zn 2+ (aq) + 2 e Zn(s) 4. Zn 2+ (aq) + H 2 (g) Zn(s) + 2 H + (aq) Cell Type 02 003 10.0 points What is the cathode in Mg(s) | Mg 2+ (aq) || Au + (aq) | Au(s) Mg 2+ + 2 e Mg E red = - 2 . 36 Au + + e Au E red = +1 . 69 and what is the cell type? 1. Au + (aq) | Au(s); a battery 2. Mg(s) | Mg 2+ (aq); an electrolytic cell 3. Mg(s) | Mg 2+ (aq); a battery 4. Not enough inFormation is provided. 5. Au + (aq) | Au(s); an electrolytic cell EC Cell Nomenclature 006 004 10.0 points IF the two halF reactions below were used to make an electrolytic cell, what species would be consumed at the cathode? HalF reaction E Cu 2+ (aq) + 2 e -→ Cu(s) +0 . 34 3+ (aq) + e 2 ±e 2+ (aq) +0 . 77 1. 2+ (aq) 2. 3+ (aq) 3. Cu(s) 4. Cu 2+ (aq) ChemPrin3e T12 02 005 10.0 points Consider the reaction S 2 O 2 4 (aq) SO 2 3 (aq) in basic solution. How many electrons appear in the balanced halF-reaction?
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Version 001 – Exam 3 – vanden bout – (51640) 2 1. 6 2. 3 3. 1 4. 2 5. 4 ChemPrin3e T12 06 006 10.0 points Consider the reaction Zn(s) + OH (aq) + H 2 O( ) + NO 3 (aq) Zn(OH) 2 4 (aq) + NH 3 (g) If the coeFcient of NO 3 in the balanced equation is 1, how many electrons are trans- ferred in the reaction? 1. 4 2. 2 3. 6 4. 10 5. 8 Msci 21 1204x 007 10.0 points Given the following standard reduction po- tentials ±e 3+ + e 2+ +0.771 V Cu 2+ + 2 e Cu +0.337 V Sn 2+ + 2 e Sn - 0 . 140 V Which of the following species would be the strongest oxidizing agent? 1. Cu 2+ 2. Cu 3. Sn 4. 2+ 5. 3+ 6. None of the species listed can act as an oxidizing agent. 7. Sn 2+ ChemPrin3e T12 46 008 10.0 points The standard voltage of the cell Ag(s) | AgBr(s) | Br (aq) || Ag + (aq) | Ag(s) is +0.73 V at 25 C. Calculate the equilibrium constant for the cell reaction.
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test3 - Version 001 Exam 3 vanden bout (51640) This...

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