Question

The number of Faradays $\left(F\right)$ required to produce $2.3\text{g}$ of sodium from molten $NaCl$ (Atomic mass of $Na=23{\text{g mol}}^{-1}$) is:

• A. $0.2$
• B. $0.1$
• C. $0.4$
• D. $0.5$

Answer 1

The correct option is B $0.1$

At Cathode $:N{a}^{+}+\underset{\underset{\left(1F\right)}{\text{1 mol}}}{e^{-}}\to \underset{\text{1 mol(23 g)}}{Na}$
Number of Faraday required $=\frac{1}{23}\times 2.3=0.1F$