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  4. In the electrolysis of water, one faraday of electrical energy would evolve

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Q. In the electrolysis of water, one faraday of electrical energy would evolve

Electrochemistry

Solution:

Hydrolysis of water :

$2 H _{2} O \rightleftharpoons 4 H ^{+}+4 e^{-}+ O _{2}$

$4 F$ charge will produce $=1 \,mole$ of $O _{2}=32\, g\, O _{2}$

$1 F$ charge will produce $=\frac{32}{4}=8 \,g$ of $O _{2}$