At 298 K, the standard electrode potentials of Cu2+/Cu, Zn2+... | Chemistry | SolveeIt | Solveeit

Today, August 19

Question

At 298 K, the standard electrode potentials of Cu2+/Cu, Zn2+/Zn, Fe2+/Fe and Ag+/Ag are 0.34 V, - 0.76 V, - 0.44 V and 0.80 V, respectively.
On the basis of standard electrode potential, predict which of the following reaction cannot occur?

A

CuSO4(aq) + Zn(s) → ZnSO4(aq) + Cu(s)

B

CuSO4(aq) + Fe(s) → FeSO4(aq) + Cu(s)

C

FeSO4(aq) + Zn(s) → ZnSO4(aq) + Fe(s)

D

2CuSO4(aq) + 2Ag(s) → 2Cu(s) + Ag2SO4(aq)

Answer

2CuSO4(aq) + 2Ag(s) → 2Cu(s) + Ag2SO4(aq)

Explanation

Solution

Order of reactivity: $Zn > Fe > Cu > Ag$
More reactive metals (lower SRP) have the ability to displace less reactive metals (higher SRP) from their salt solution in the event of a displacement reaction.
Cu(s) + Ag2 SO4(aq.) → CuSO4(aq.) + 2Ag(s)
It is impossible to react.