Answer to Question #164274 in General Chemistry for Parul

Question

Is the reaction spontaneous ? Prove .

Zn(s) + 2Ag+

 (aq) →Zn2+ (aq) + 2Ag(s)

Answer 1

For a reaction to be spontaneous, net electrode potential must be positive which means $\triangle G$ be negative.

$E(Zn|Zn^{+2})=0.76 \ V$ and $E(Ag^+|Ag)=0.80\ V$

So, $E(Zn|Zn^{+2}||Ag^+|Ag)=0.80+0.76=+1.56\ V$

So, Standard electrode potential of this reaction is positive ,which means $\triangle G$ is negative and the reaction is spontaneous.