Question

The strength (g/L) of 10 volume solution of hydrogen peroxide ____________.

Options

• 29.96 g/L

• 59.91 g/L

• 14.96 g/L

• 45.15 g/L

Answer 1

The strength (g/L) of 10 volume solution of hydrogen peroxide 29.96 g/L.

Explanation:

10 volume at S.T.P., one litre of H₂O₂ solution will liberate ten litres of oxygen. Calculate the amount of H₂O₂ (in grammes) required to produce 10 L of oxygen at STP. This amount will be present in a litre of H₂O₂ solution with a 10 volume solution.

Hydrogen peroxide (H₂O₂) decomposes as:

\[\ce{\underset{2 × 34 = 68 g}{2H2O2} -> 2H2O + \underset{22.7 L at {S.T.P.}}{O2}}\]

22.7 L of O₂ at S.T.P. is produced from H₂O₂ = 68 g

10 L of O₂ at S.T.P. is produced from H₂O₂ = `68/22.7 xx 10` = 29.96 g = 29.96 g/litre