Question

During the electrolysis of molten sodium chloride, the time required to produce $0.10$ mol of chlorine gas using a current of $3$ amperes is

• A. 55 minutes
• B. 110 minutes
• C. 220 minutes
• D. 330 minutes

Answer 1

Answer: (B)

110 minutes

Answer 2

At Cathode:
${2H_2O ->[2e^{-}] H_2 + 2OH^{-}}$
At anode:
${2Cl^{-} ->[2e^{-}] Cl_2 + 2e^{-}}$
$\frac{W}{E} = \frac{It}{96500}$
$0.1 \times 2 = \frac{3 \times t(sec)}{96500}$
t = 6433 sec
t = 107.2 min
$\sim$ 110 min.