quiz 6 ch 204 - Version 062/AADDC – Quiz 6 – Lyon –...

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Unformatted text preview: Version 062/AADDC – Quiz 6 – Lyon – (52635) 1 This print-out should have 8 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 1 2 3 4 5 6 7 AA AB AC AD BA BB BC 8 9 10 BACK NEXT BD CA CB CC CD There are NO RETRIES on this quiz. You receive 10 points for correct answers and zero for incorrect answers. 001 10.0 points Given the oxidation-reduction half-reactions Al(s) → Al 3+ (aq) Cu 2+ (aq) → Cu(s) what is the overall balanced reaction equa- tion? 1. 3 Al(s) + 2 Cu 2+ (aq) → 3 Al 3+ (aq) + 2 Cu(s) 2. Al(s) + Cu 2+ (aq) → Al 3+ (aq) + Cu(s) 3. 2 Al 3+ (aq) + 3 Cu 2+ (s) → 3 Cu(s) + 2 Al(s) 4. 2 Al(s) + 3 Cu 2+ (aq) → 2 Al 3+ (aq) + 3 Cu(s) correct 5. 3 Al(s) + Cu 2+ (aq) → Al 3+ (aq) + 2 Cu(s) Explanation: 002 10.0 points If the oxidation state of H is +1 and O is- 2, what is the oxidation state of C in C 2 H 4 O? 1.- 1 2 2.- 2 3.- 1 correct 4. +1 5. +2 Explanation: To calculate oxidation numbers, remember that the the sum of the numbers must equal the total charge on the molecule or in the case of neutral species, zero. Let x be the oxidation number of C. 2 x + 4(+1) + (- 2) = 0 C 2 H 4 O : 2 x + 2 = 0 2 x =- 2 x =- 1 003 10.0 points Consider the metals in the following reactions....
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This note was uploaded on 04/14/2010 for the course CH CH302 taught by Professor Mccord during the Spring '10 term at University of Texas at Dallas, Richardson.

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quiz 6 ch 204 - Version 062/AADDC – Quiz 6 – Lyon –...

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