QJEEM11Chd977: JEE Main 2011 Chemistry - Class 12 JEEM11Chd977 Solution: The reduction potential of hydrogen half cell will be negative…

Question

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The reduction potential of hydrogen half cell will be negative if :

Accepted Answer

H^{+} + e^{-} \overset{}{⟶} \frac{1}{2} H_{2};

E = E^{\circ} - \frac{0.059}{1} \log \frac{P_{H_{2}}^{1 / 2}}{[H^{+}]}

Now if

P_{H_{2}} = 2

atm and

[H^{+}] = 1 M

then

E = 0 - \frac{0.059}{1} \log \frac{2^{1 / 2}}{1} = - 2

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