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What is the volume strength of a 1 M solution of H2O2? (Molar mass of H2O2 = 34 g/mol.)

1. 16.8
2. 11.35
3. 22.4
4. 5.6

Correct answer: 11.35

Solution

Each mole of H2O2 releases 0.5 mol O2 = 11.2 L at STP, so 1 M H2O2 has volume strength 1*11.2 approx 11.35 ('11.2 volume').

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