SUPPL INSTR FOR CH 302 (GE 206E) - HW10SOL

# SUPPL INSTR FOR CH 302 (GE 206E) - HW10SOL - Moore Robert...

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Moore, Robert – Homework 10 – Due: Apr 22 2007, midnight – Inst: McCord 1 This print-out should have 15 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. The due time is Central time. 001 (part 1 of 1) 10 points What takes place at the negatively charged terminal of a voltaic cell? 1. the net redox reaction 2. reduction 3. oxidation correct 4. combustion Explanation: 002 (part 1 of 1) 10 points An aqueous solution of bismuth nitrate (Bi(NO 3 ) 3 ) was electrolyzed until 33 grams of metallic bismuth was plated out at the cath- ode. How many Faradays of electricity must have passed through the cell? Correct answer: 0 . 473727 . Explanation: 003 (part 1 of 1) 10 points What current is required to produce 91.6 g of chromium metal from chromium(VI) oxide in 12.4 hours? 1. 16.3 A 2. 22.8 A correct 3. 20.1 A 4. 15.4 A 5. 18.4 A Explanation: 004 (part 1 of 1) 10 points How many grams of Cu metal (63.55 g/mol) will be plated out of a Cu(NO 3 ) 2 solution by passing a current of 3.00 amperes for 11 minutes? (1 Faraday = 96,485 Coulombs) 1. 0.652 g correct 2. No other answer is within 2 percent.

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