Question

Oxidation of succinate ion produces ethylene and carbon dioxide gases. On passing $0.2$ Faraday electricity through an aqueous solution of potassium succinate, the total volume of gases (at both cathode and anode) at STP ($1\, atm$ and $273\, K$) is :

• A. $2.24\, L$
• B. $4.48\, L$
• C. $6.72\, L$
• D. $8.96\, L$

Answer 1

Answer: (D)

$8.96\, L$

Answer 2

Total equivalents of $C_{2}H_{4}+CO_{2}+H_{2} = 0.2+0.2+0.2 = 0.6$ Total moles of gases $= \frac{0.2}{2}+\frac{0.2}{1}+\frac{0.2}{2} = 0.4$ $v = \frac{nRT}{P} = \frac{0.4\times0.0821\times273}{1}$ $= 8.96\,L$