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A 100 mL sample of H2O2 solution liberates 5.6 litre of O2 gas measured at 1 bar and 0 deg C (STP). What is the volume strength of this H2O2 solution?

1. 56 volume
2. 11.2 volume
3. 28 volume
4. 5.6 volume

Correct answer: 56 volume

Solution

Volume strength is the litres of O2 at STP given by one litre of solution; equivalently mL O2 per mL solution. 5.6 L from 100 mL = 5600 mL/100 mL = 56.

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