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The Following Half-Reactions Occur in the Mercury Battery Used in Calculators

Question 60

Multiple Choice

The following half-reactions occur in the mercury battery used in calculators. If E °\degree 1U1B1cell = 1.357 V, calculate the equilibrium constant for the cell reaction at 25 °\degree C. (Assume the stoichiometric coefficients in the cell reaction are all equal to 1.) HgO(s) + H2O(l) + 2e¯  The following half-reactions occur in the mercury battery used in calculators. If E \degree 1U1B1cell</sub> = 1.357 V, calculate the equilibrium constant for the cell reaction at 25 \degree C. (Assume the stoichiometric coefficients in the cell reaction are all equal to 1.)  HgO(s)  + H<sub>2</sub>O(l)  + 2e¯   Hg(l)  + 2OH¯(aq)  ZnO(s)  + H<sub>2</sub>O(l)  + 2e¯   Zn(s)  + 2OH¯(aq)  A)  9.4 * 10<sup>22</sup> B)  7.5 *10<sup>45</sup> C)  6.4 * 10<sup>63</sup> D)  7.8 * 10<sup>91</sup> E)  > 9.9* 10<sup>99</sup> Hg(l) + 2OH¯(aq)
ZnO(s) + H2O(l) + 2e¯  The following half-reactions occur in the mercury battery used in calculators. If E \degree 1U1B1cell</sub> = 1.357 V, calculate the equilibrium constant for the cell reaction at 25 \degree C. (Assume the stoichiometric coefficients in the cell reaction are all equal to 1.)  HgO(s)  + H<sub>2</sub>O(l)  + 2e¯   Hg(l)  + 2OH¯(aq)  ZnO(s)  + H<sub>2</sub>O(l)  + 2e¯   Zn(s)  + 2OH¯(aq)  A)  9.4 * 10<sup>22</sup> B)  7.5 *10<sup>45</sup> C)  6.4 * 10<sup>63</sup> D)  7.8 * 10<sup>91</sup> E)  > 9.9* 10<sup>99</sup> Zn(s) + 2OH¯(aq)


A) 9.4 * 1022
B) 7.5 *1045
C) 6.4 * 1063
D) 7.8 * 1091
E) > 9.9* 1099

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