Chemistry

Problem

A galvanic cell is constructed in acidic solution using the following half-reactions (potentials are standard reduction potentials): Cathode:

\mathrm{Ce^{4+} + e^- \rightarrow Ce^{3+}}\qquad E^\circ = +1.61\,\text{V}

Anode:

\mathrm{Cu^{2+} + 2e^- \rightarrow Cu} \qquad E^\circ = +0.34\,\text{V}

After the overall reaction is properly balanced for charge, what is the standard cell potential,

E^\circ_{\text{cell}}

, for the spontaneous process? a)

+1.95\,\text{V}

+0.645\,\text{V}

+1.27\,\text{V}

-1.27\,\text{V}