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Q. A certain current liberated 0.504 g of hydrogen in 2 h. How many grams of copper can be liberated by the same current flowing for the same time in a copper sulphate solution? Given Atomic mass of Cu = 63.5

NTA AbhyasNTA Abhyas 2022

Solution:

According to Faraday's second law,
$\frac{W e i g h t \, o f \, C u}{W e i g h t \, o f \, H_{2}}=\frac{E q . w t . o f \, C u}{E q . w t . o f \, H_{2}}$
$\frac{\text{Weight of Cu}}{\text{0.504}}=\frac{\text{63.6/2}}{1}$
$\therefore \, $ Weight of Cu $ \, =15.9 \, g$