Question

In producing chlorine through electrolysis, $100\, kW$ power at $125\, V$ is being consumed. The mass of chlorine per minute liberated, will be $\left(z=0.367 \times 10^{-6} kg / C \right)$

• A. $17.61 \times 10^{-3} kg$
• B. $10.61 \times 10^{-3} kg$
• C. $12.61 \times 10^{-3} kg$
• D. None of the above

Answer 1

Answer: (A)

From Faraday's law of electromagnetic induction, mass of electrons released is
$m=Z I t$
where $I$ is current, $t$ is time and $z$ electrochemical equivalent.
Also, $P=V I$
$\therefore I=\frac{P}{V}=\frac{100 \times 10^{3}}{125}=800\, A$
$m =Z I t$
$=0.367 \times 10^{-6} \times 800 \times 60$
$=17.61 \times 10^{-3} kg$