Question

The magnitude of the change in oxidising power of the MnO^-₄ / Mn²⁺ couple is x × 10^–4 V, if the H⁺ concentration is decreased from 1 M to 10^–4 M at 25°C. (Assume concentration of MnO²⁺₄ and Mn²⁺ to be same on change in H⁺ concentration). The value of x is ......(Rounded off to the nearest integer)

[Given : \(\frac{2.303\,RT}{F}\) = 0.059]

Answer 1

Eqn is-

\(MnO^-_4+H^\oplus +5e^- \rightarrow Mn^{+2}+4H_2O\)

Nernst equation: