Question

How many Faraday ($F$) are required for the reduction of $1$ mole of ${Ni}^{2+}$ to $Ni\left(s\right)$?

• A. $1F$
• B. $2F$
• C. $96,487F$
• D. $6.022\times {10}^{23}F$

Answer 1

The correct option is B $2F$

$N{i}^{2+}+2e^{-}\to Ni$

1 mole of $N{i}^{2+}$ requires 2 moles of electrons to be reduced to $Ni$.

1 mole of electrons has $1F$ charge, hence 2 moles of electrons have $2F$ charge.