The voltage of the cell given below is : Pt _ H _2 ,| , NaHSO _3 (0.4 M ) ,| , Na _2…

CHEMISTRY · Subjective · AP · Chemistry · Thermodynamics and Electrochemistry · Thermodynamics and Electrochemistry

Problem

The voltage of the cell given below is

-0.46\text{ V}

\text{Pt}_{\text{H}_2}\,|\,\text{NaHSO}_3\ (0.4\text{ M})\,|\,\text{Na}_2\text{SO}_3\ (6.44\times 10^{-3}\text{ M})\,|\,\text{Zn}^{2+}\ (0.3\text{ M})\,|\,\text{Zn}(s)

Also,

\text{Zn}^{2+} + 2e \longrightarrow \text{Zn}(s)

E^\circ = -0.763\text{ V}

. Calculate the value of

K_2

, where

K_2 = \frac{[\text{H}^+][\text{SO}_3^{2-}]}{[\text{HSO}_3^-]}