Question

During the electrolysis of $AgN{O}_3$, the volume of $O_2$ formed at STP due to passage of $2A$ of current for $965s$ is:

• A. $0.112L$
• B. $0.224L$
• C. $11.2L$
• D. $22.4L$

Answer 1

The correct option is A $0.112L$

Number of Faradays = $\frac{It}{96500}$

$=\frac{2\times 965}{96500}$

$=0.02$
Anode:
$2H_{2}O\left(l\right)\to O_2\left(g\right)+4H^{\oplus }\left(aq\right)+4e^{-}$

$\Rightarrow$ $4F$ electricity = $1$ mol $O_2\equiv 22.4L{O}_2$ at $STP$

$\Rightarrow$ $0.02F$ electricity = $22.4\times \frac{0.02}{4}$
= $0.112L$ $O_2$ at $STP$