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The strength of 11.2 volume solution of H2O2 is: [Given that molar mass of H = 1 g mol⁻¹ and O = 16 g mol⁻¹]

1. 1.7%
2. 34%
3. 3.4%
4. 13.6%

Correct answer: 3.4%

Solution

Volume strength 11.2 means molarity = 11.2/11.2 = 1 M. Strength = 1 * 34 = 34 g/L, i.e. 34 g per 1000 g (~1 L) solution = 3.4% w/v.

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