Question

Calculate the amounts of Na and chlorine gas produced during the electrolysis of fused $NaCl$ by the passage of 1 ampere current for 25 minutes.

• A. 0.3565 gm and 0.55 gm
• B. 0.3565 gm and 0.66 gm
• C. 0.55 gm and 0.3565
• D. None of above

Answer 1

The correct option is A 0.3565 gm and 0.55 gm

$i=1amp$

$t=25min=25\times 60sec$

Molar mass of $Na=23gmo{l}^{-1}$

Molar mass of $C{l}_2=71gmo{l}^{-1}$

$C{l}^{-}=\frac{1}{2}\left(12\right)=35.5g$

Formula used, $m=\frac{Molarmass}{n\times F}\times i\times t$

For $Na$, $n=1$

$m=\frac{23}{1\times 96500}\times 1\times 25\times 60$

$=0.3575g$

For $Cl$, $n=1$

$m=\frac{35.5}{1\times 96500}\times 1\times 25\times 60$

$=0.5518g$

$\therefore$ The amounts of $Na$ and $Cl$ gas produced are $0.3575g$ and $0.5518g$ respectively.