Question

The electronic configuration of Cu(II) is $3d^{9}$ whereas that of Cu(I) is $3d^{10}$which of the following is correct?

• A. Cu(II) is more stable.
• B. Cu (II) is less stable
• C. Cu(I) and Cu(II) are equally stable
• D. Stability of Cu(I) and Cu(II) depends on nature of copper salts.

Answer 1

Answer: (A)

Cu(II) is more stable.

Answer 2

Standard electrode potential of $Cu^{2 +}$ is high ($0.52V$) as compared to$Cu^{2 +}(0.34V)$, hence $Cu^{+}$is reduced more easily and is less stable than $Cu^{2 +}$