Question

How many grams of nickel can be electroplated from a solution of nickel chloride by $4F$ of electricity?

• A. 29.3
• B. 58.7
• C. 117.4
• D. 176.1

Answer 1

Answer: (C)

$NiC{l}_2\stackrel{\text{ Electrolysis }}{\to }N{i}^{2+}+2C{l}^{-}$
At anode, $2C{l}^{-}\to C{l}_2+2e^{-}$

$\because 2F$ electricity deposits $Ni=58.6g$
$\therefore 4F$ electricity will deposit
$Ni=\frac{58.6}{2F}\times 4F=117.2g$