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    Exam 19: Electrochemistry
  5. Question
    Given: Zn<sup>2+</sup>(aq)+ 2e<sup>-</Sup> Zn(s); E° = -0.76 V
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Given: Zn2+(aq)+ 2e- Zn(s); E° = -0.76 V

Question 20

Question 20

Multiple Choice

Given:
Zn2+(aq) + 2e- Given: Zn<sup>2+</sup>(aq) + 2e<sup>-</sup>  Zn(s) ; E° = -0.76 V Cu<sup>2+</sup>(aq) + 2e<sup>-</sup>  Cu(s) ; E° = 0.34 V Cr<sub>2</sub>O<sub>7</sub><sup>2-</sup>(aq) + 14H<sup>+</sup>(aq) + 6e<sup>-</sup>  2Cr<sup>3+</sup>(aq) + 7H<sub>2</sub>O(l) ; E° = 1.33 V Which of the following species is the strongest oxidizing agent? A) Zn B) Cr<sup>3+</sup> C) Cr<sub>2</sub>O<sub>7</sub><sup>2-</sup> D) Zn<sup>2+</sup> E) CuZn(s) ; E° = -0.76 V
Cu2+(aq) + 2e- Given: Zn<sup>2+</sup>(aq) + 2e<sup>-</sup>  Zn(s) ; E° = -0.76 V Cu<sup>2+</sup>(aq) + 2e<sup>-</sup>  Cu(s) ; E° = 0.34 V Cr<sub>2</sub>O<sub>7</sub><sup>2-</sup>(aq) + 14H<sup>+</sup>(aq) + 6e<sup>-</sup>  2Cr<sup>3+</sup>(aq) + 7H<sub>2</sub>O(l) ; E° = 1.33 V Which of the following species is the strongest oxidizing agent? A) Zn B) Cr<sup>3+</sup> C) Cr<sub>2</sub>O<sub>7</sub><sup>2-</sup> D) Zn<sup>2+</sup> E) CuCu(s) ; E° = 0.34 V
Cr2O72-(aq) + 14H+(aq) + 6e- Given: Zn<sup>2+</sup>(aq) + 2e<sup>-</sup>  Zn(s) ; E° = -0.76 V Cu<sup>2+</sup>(aq) + 2e<sup>-</sup>  Cu(s) ; E° = 0.34 V Cr<sub>2</sub>O<sub>7</sub><sup>2-</sup>(aq) + 14H<sup>+</sup>(aq) + 6e<sup>-</sup>  2Cr<sup>3+</sup>(aq) + 7H<sub>2</sub>O(l) ; E° = 1.33 V Which of the following species is the strongest oxidizing agent? A) Zn B) Cr<sup>3+</sup> C) Cr<sub>2</sub>O<sub>7</sub><sup>2-</sup> D) Zn<sup>2+</sup> E) Cu2Cr3+(aq) + 7H2O(l) ; E° = 1.33 V
Which of the following species is the strongest oxidizing agent?


A) Zn
B) Cr3+
C) Cr2O72-
D) Zn2+
E) Cu

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