Question

What is the amount of chlorine evolved when 2 amperes of current is passed for 30 minutes in an aqueous solution of $O_{2}$.

• A. 66 g
• B. 1.32 g
• C. 33 g
• D. 99 g

Answer 1

Answer: (B)

1.32 g

Answer 2

At Andoe $AtAnodeCl^{-} \rightarrow \frac{1}{2}Cl_{2} + e^{-}$

$E_{Cl_{2}} = \frac{35.5 \times 2}{2} = 35.5$

$W_{Cl_{2}} = \frac{E_{Cl_{2}} \times I \times t}{96500} = \frac{35.5 \times 2 \times 30 \times 60}{96500} = 1.32gm$.