15. The total volume of gas liberated at STP when 1 Faraday of electricity is passed through a dilut — Electrochemistry Chemistry Question
Question
15. The total volume of $O_2$ gas liberated at STP when 1 Faraday of electricity is passed through a dilute aqueous solution of $H_2SO_4$ is:
Answer: C
💡 Solution & Explanation
The anodic reaction is $2H_2O \rightarrow O_2 + 4H^+ + 4e^-$. Thus, 4 Faradays liberate 1 mole of $O_2$ (22.4 L at STP). Passing 1 Faraday liberates $1/4$ mole of $O_2$, which corresponds to $22.4 / 4 = 5.6$ L.
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