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  4. A certain current liberated 0.504 g of hydrogen in 2 hours. How many grams of copper can be liberated by the same current flowing for the same time in copper sulphate solution?

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Q. A certain current liberated $0.504\, g$ of hydrogen in $2$ hours. How many grams of copper can be liberated by the same current flowing for the same time in copper sulphate solution?

AIIMSAIIMS 1998Electrochemistry

Solution:

$\frac{\text { MassofHydrogen }}{\text { Massofcopper }}$

$=\frac{\text { EquivalentmassofHydrogen }}{\text { Equivalentmassofcopper }}$

$\Rightarrow \frac{0.504}{\text { Massofcopper }}=\frac{1}{63.5 / 2}$

$\Rightarrow $ Mass of copper deposited $=16.0\, g$