The following standard reduction potentials are given: Zn Zn, Cu Cu, Consider the…

CHEMISTRY · Single correct · A Level · Chemistry · Electrode potentials · Electrode potentials

Problem

The following standard reduction potentials are given: Zn

^{2+}+2e^-\rightarrow

Zn,

E^\circ=-0.76\,\text{V}

^{2+}+2e^-\rightarrow

Cu,

E^\circ=+0.34\,\text{V}

Consider the reaction under standard conditions: Zn

(s)+

^{2+}(aq)\rightarrow

^{2+}(aq)+

(s)

. What is

E^\circ_{\text{cell}}

for this reaction, and is the reaction thermodynamically favored? (a)

E^\circ_{\text{cell}}=-0.42\,\text{V};

the reaction is not thermodynamically favored. (b)

E^\circ_{\text{cell}}=+0.42\,\text{V};

the reaction is thermodynamically favored. (c)

E^\circ_{\text{cell}}=+1.10\,\text{V};

the reaction is thermodynamically favored. (d)

E^\circ_{\text{cell}}=-1.10\,\text{V};

the reaction is not thermodynamically favored.