Midterm III Chem 1C Section 20 Version D

Midterm III Chem 1C Section 20 Version D - Midterm III Chem...

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Page 1 Midterm III Chem 1C Section 20 Version D Key 1. (p. 904) Consider the reaction CuO( s ) + H 2 ( g ) Cu( s ) + H 2 O( l ) In this reaction, which substances are the oxidant and reductant, respectively? A. CuO and H 2 b. H 2 and CuO c. CuO and Cu d. H 2 O and H 2 e. none of these choices is correct 2. (p. 907) When the following redox equation is balanced with smallest whole number coefficients, the coefficient for nitrogen dioxide will be _____. I 2 ( s ) + HNO 3 ( aq ) HIO 3 ( aq ) + NO 2 ( g ) + H 2 O( l ) a. 1 b. 2 c. 4 D. 10 e. none of these choices is correct 3. (p. 907) When the following redox equation is balanced with smallest whole number coefficients, the coefficient for the hydrogen sulfate ion will be ______. Al( s ) + HSO 4 - ( aq ) + OH - ( aq ) Al 2 O 3 ( s ) + S 2- ( aq ) + H 2 O( l ) a. 1 B. 3 c. 4 d. 8 e. none of these choices is correct
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Page 2 4. (p. 908) Which of the following statements about voltaic and electrolytic cells is correct? a. The electrons in the external wire flow from cathode to anode in both types of cell. b. Oxidation occurs at the cathode only in a voltaic cell. c. The free energy change, Δ G , is negative for an electrolytic cell. D. The cathode is labeled as positive (+) in a voltaic cell but negative (-) in an electrolytic cell. e.
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Midterm III Chem 1C Section 20 Version D - Midterm III Chem...

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