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Chemistry
The standard emf of a galvanic cell involving 3 moles of electrons in its redox reaction is 0.59 V. The equilibrium constant for the reaction of the cell is
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Q. The standard emf of a galvanic cell involving $3$ moles of electrons in its redox reaction is $0.59 \,V$. The equilibrium constant for the reaction of the cell is
KCET
KCET 2010
Electrochemistry
A
$10^{20}$
14%
B
$10^{25}$
17%
C
$10^{30}$
53%
D
$10^{15}$
16%
Solution:
$E_{\text {cell }}^{\circ} =\frac{0.0591}{n} \log K_{c}$
$0.59 =\frac{0.0591}{3} \log K_{c} \\ \frac{0.59 \times 3}{0.059} =\log K_{c}$
$\therefore \log K_{c} =30$
$K_{c} =$ antilog $30$
$=10^{30}$