QJEEM19Ch22f2: JEE Main 2019 Chemistry - Class 12 JEEM19Ch22f2 Solution: If the standard electrode potential for a cell is 2 V at 300 K, …

Question

Verified Solution • 2025–26 Session moderate

If the standard electrode potential for a cell is 2 V at 300 K, the equilibrium constant (K) for the reaction

Zn(s) + Cu²⁺ (aq)

\rightleftharpoons

Zn²⁺(aq) + Cu(s)

at 300 K is approximately,

(R = 8 JK^{$-$ 1}mol^{$-$ 1}, F = 96000 C mol^{$-$ 1})

Accepted Answer

\Delta

G^o =

-

RT lnk =

-

nFE^o_cell

lnk =

{{n \times F \times {E^o}} \over {R \times T}} = {{2 \times 96000 \times 2} \over {8 \times 300}}

lnk = 160

k = e¹⁶⁰

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