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Question

(C) According to Faraday's second law of electrolysis,for cells connected in series,the mass of substances deposited is proportional to their equivale

Vedclass · Accepted Answer

$0.3177$

Vedclass · Answer

(C) According to Faraday's second law of electrolysis,for cells connected in series,the mass of substances deposited is proportional to their equivalent weights. $\frac{	ext{Mass of } Cu}{	ext{Mass of } Ag} = \frac{	ext{Equivalent weight of } Cu}{	ext{Equivalent weight of } Ag}$ The equivalent weight of $Ag$ $(Ag^+)$ is $108/1 = 108$. The equivalent weight of $Cu$ $(Cu^{2+})$ is $63.5/2 = 31.75$. $\frac{	ext{Mass of } Cu}{1.08 \ g} = \frac{31.75}{108}$ $	ext{Mass of } Cu = \frac{31.75 	imes 1.08}{108} = 0.3175 \ g$. The closest option is $0.3177 \ g$.

$A$ certain quantity of electricity is passed through an aqueous solution of $AgNO_3$ and a cupric salt solution connected in series. The amount of $Ag$ deposited is $1.08 \ g$. The amount of copper deposited is ............. $g$ (atomic weight of $Cu = 63.5$; $Ag = 108$).

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