If standard emf of the cell, $\mathrm{Cu\,|\,Cu^{2+}(aq)\,\|\,[Cu(NH_3)_4]^{2+}, aq.NH_3\,|\,Cu}$ is 0.35, then stability constant of the formation cupric amine complex is
(a)$1.0 \times 10^{27}$
(b)$8.4 \times 10^{5}$
(c)$7.0 \times 10^{11}$
(d)$4.3 \times 10^{13}$
Answer
SELF-PRACTICE — the source book printed no answer.
Nothing is invented here, so this question has no answer on record.