Question

For the electrochemical cell, $M \left|M^{+}\right|\left|X^{-}\right|X, E^{∘}\left(M^{+}/ M\right)=0.44V $ and $E^{∘}\left(X/X^- \right)=0.33 V.$
From this data, one can deduce that

• A. $M+X \rightarrow M^{+}+X^{-}$ is the spontaneous reaction
• B. $M^{+}+X^{-} \rightarrow M+X$ is the spontaneous reaction
• C. $E_{\text{cell}}=0.77\, V$
• D. $E_{\text{cell}}=-0.77 \,V$

Answer 1

Answer: (B)

The spontaneous cell reaction is
$X^{-}+M^{+} \longrightarrow M+X ; E^{\circ}=0.11 \,V$