Question

What is the amount of chlorine evolved when $2$ ampere of current is passed for $30$ minutes in an aqueous solution of $NaCl$?

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

Answer 1

Answer: (B)

$1.32g$

According to Faraday's $1^{st}$ law

$m=Eit$

$m=\frac{Eit}{96500}$ $E=\frac{Atomicmass}{Valency}$

$\Rightarrow m=\frac{35.5\times 2\times 30\times 60}{96500}$ $E=\frac{35.5}{1}=35.5$

$\Rightarrow m=1.324g$

$\because$ Mass of $C{l}^{-}$ evolved $m=1.324g$.