Question

The amount of chlorine evolved by passing 2A of current in an aqueous solution of NaCl for 30 minute is

• A. $2.64g$
• B. $1.32g$
• C. $3.62g$
• D. $4.22g$

Answer 1

Answer: (B)

$1.32g$

Answer 2

$NaCl \rightarrow Na^{+} + Cl^{-}$

$2Cl^{-} + 2e^{-} \rightarrow Cl_{2}$

$Q = I \times t = 2 \times 30 \times 60 = 3600Coulombs$

$2 \times 96500$ Coulombs produce

= 71 g of $Cl_{2}$

3600 Coulombs will produce

$= \frac{71}{2 \times 96500} \times 3600$

$= 1.32gofCl_{2}$