A Voltaic Cell Is Constructed with Two $\mathrm { Zn } ^ { 2 + }$

question 62

Multiple Choice

A voltaic cell is constructed with two $\mathrm { Zn } ^ { 2 + }$ -Zn electrodes,where the half-reaction is $\quad$
$\quad$$\mathrm { Zn } ^ { 2 + }$ + $2 \mathrm { e } ^ { - }$ ? Zn (s) $\quad$$\quad$ E° = -0.763 V The concentrations of zinc ion in the two compartments are 1.17 × $10 ^ { - 2 }$ mol L^-1 and 8.70 × $10 ^ { - 2 }$ mol L^-1,respectively.The cell emf is ________ V.

• A)0.170
• B)-0.678
• C)-0.0850
• D)515
• E)0.0850

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