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’25 volume’ hydrogen peroxide means

1. 1 L marketed solution contains 250 g of H2O2.
2. 100 mL marketed solution contains 25 g of H2O2.
3. 1 L marketed solution contains 25 g of H2O2.
4. 1 L marketed solution contains 75 g of H2O2.

Correct answer: 1 L marketed solution contains 75 g of H2O2.

Solution

The term '25 volume' hydrogen peroxide indicates that 1 liter of the solution can release 25 liters of oxygen gas at standard conditions, which corresponds to a concentration of approximately 75 grams of H2O2 per liter.

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