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    Exam 19: Electrochemistry
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    Given: Hg<sup>2+</sup>(aq)+ 2e<sup>-</Sup> Hg(s); E° = 0.85 V
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Given: Hg2+(aq)+ 2e- Hg(s); E° = 0.85 V

Question 42

Question 42

Multiple Choice

Given:
Hg2+(aq) + 2e- Given: Hg<sup>2+</sup>(aq) + 2e<sup>-</sup>  Hg(s) ; E° = 0.85 V Li<sup>+</sup>(aq) + e<sup>-</sup>  Li(s) ; E° = -3.04 V Br<sub>2</sub>(l) + 2e<sup>-</sup>  2Br<sup>-</sup>(aq) ; E° = 1.07 V Au<sup>+</sup>(aq) + e<sup>-</sup>  Au(s) ; E° = 1.69 V Cl<sub>2</sub>(g) + 2e<sup>-</sup>  2Cl<sup>-</sup>(aq) ; E° = 1.36 V Which of the following species is the best reducing agent? A) Hg B) Li<sup>+</sup> C) Au D) Cl<sup>-</sup> E) Br<sup>-</sup>Hg(s) ; E° = 0.85 V
Li+(aq) + e- Given: Hg<sup>2+</sup>(aq) + 2e<sup>-</sup>  Hg(s) ; E° = 0.85 V Li<sup>+</sup>(aq) + e<sup>-</sup>  Li(s) ; E° = -3.04 V Br<sub>2</sub>(l) + 2e<sup>-</sup>  2Br<sup>-</sup>(aq) ; E° = 1.07 V Au<sup>+</sup>(aq) + e<sup>-</sup>  Au(s) ; E° = 1.69 V Cl<sub>2</sub>(g) + 2e<sup>-</sup>  2Cl<sup>-</sup>(aq) ; E° = 1.36 V Which of the following species is the best reducing agent? A) Hg B) Li<sup>+</sup> C) Au D) Cl<sup>-</sup> E) Br<sup>-</sup>Li(s) ; E° = -3.04 V
Br2(l) + 2e- Given: Hg<sup>2+</sup>(aq) + 2e<sup>-</sup>  Hg(s) ; E° = 0.85 V Li<sup>+</sup>(aq) + e<sup>-</sup>  Li(s) ; E° = -3.04 V Br<sub>2</sub>(l) + 2e<sup>-</sup>  2Br<sup>-</sup>(aq) ; E° = 1.07 V Au<sup>+</sup>(aq) + e<sup>-</sup>  Au(s) ; E° = 1.69 V Cl<sub>2</sub>(g) + 2e<sup>-</sup>  2Cl<sup>-</sup>(aq) ; E° = 1.36 V Which of the following species is the best reducing agent? A) Hg B) Li<sup>+</sup> C) Au D) Cl<sup>-</sup> E) Br<sup>-</sup>2Br-(aq) ; E° = 1.07 V
Au+(aq) + e- Given: Hg<sup>2+</sup>(aq) + 2e<sup>-</sup>  Hg(s) ; E° = 0.85 V Li<sup>+</sup>(aq) + e<sup>-</sup>  Li(s) ; E° = -3.04 V Br<sub>2</sub>(l) + 2e<sup>-</sup>  2Br<sup>-</sup>(aq) ; E° = 1.07 V Au<sup>+</sup>(aq) + e<sup>-</sup>  Au(s) ; E° = 1.69 V Cl<sub>2</sub>(g) + 2e<sup>-</sup>  2Cl<sup>-</sup>(aq) ; E° = 1.36 V Which of the following species is the best reducing agent? A) Hg B) Li<sup>+</sup> C) Au D) Cl<sup>-</sup> E) Br<sup>-</sup>Au(s) ; E° = 1.69 V
Cl2(g) + 2e- Given: Hg<sup>2+</sup>(aq) + 2e<sup>-</sup>  Hg(s) ; E° = 0.85 V Li<sup>+</sup>(aq) + e<sup>-</sup>  Li(s) ; E° = -3.04 V Br<sub>2</sub>(l) + 2e<sup>-</sup>  2Br<sup>-</sup>(aq) ; E° = 1.07 V Au<sup>+</sup>(aq) + e<sup>-</sup>  Au(s) ; E° = 1.69 V Cl<sub>2</sub>(g) + 2e<sup>-</sup>  2Cl<sup>-</sup>(aq) ; E° = 1.36 V Which of the following species is the best reducing agent? A) Hg B) Li<sup>+</sup> C) Au D) Cl<sup>-</sup> E) Br<sup>-</sup>2Cl-(aq) ; E° = 1.36 V
Which of the following species is the best reducing agent?


A) Hg
B) Li+
C) Au
D) Cl-
E) Br-

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