Question

What volume of \(O_{2(g)}\) is produced when \(2F\) current is passed through a very dilute aqueous solution of \(H_2SO_4\) at STP?

• A. \(36 \text{ dm}^3\)
• B. \(48.6 \text{ dm}^3\)
• C. \(22.4 \text{ dm}^3\)
• D. \(11.2 \text{ dm}^3\)

Hint:

Remember the equivalent volumes of common gases at STP for \(1F\) charge:
\(H_2 \to 11.2 \text{ L} \text{ (needs } 2e^- \text{ per molecule)}\)
\(O_2 \to 5.6 \text{ L} \text{ (needs } 4e^- \text{ per molecule)}\)
\(Cl_2 \to 11.2 \text{ L} \text{ (needs } 2e^- \text{ per molecule)}\)
Since \(1F\) produces \(5.6 \text{ L}\) of \(O_2\), \(2F\) will produce \(11.2 \text{ L}\).

Answer 1

The Correct Option is D