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Exactly 0.2 mole electrons are passed th...

Exactly 0.2 mole electrons are passed through two electrolytic cells in series containing `CuSO_(4)` and `ZnSO_(4)` respectively. How many grams of each metal will be deposited on the respective cathodes in the two cells ?

Text Solution

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Gram equivalent mass of copper `=63.5/2 = 31.75`g
Gram equivalent mass of zinc = `65.0/2 = 32.50`g
Now 1.0 mole of electrons deposit copper = 31.75 g
0.2 mole of electrons deposit copper =`(31.75 xx 0.2)/1.0 = 6.35`g
Similarly, 1.0 mole of electrons deposit zinc = 32.50 g
0.2 mole of electrons deposit zinc `=(32.5 xx 0.2)/1.0 = 6.50 g`
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