Hydrogen peroxide decomposes on heating according to the equation:
From the equation,
22.4 litres of O2 at N.T.P. are obtained from 2 × 34 or 68 g of H2O2
∴ 10 ml of O2 at N.T.P. will be obtained from \(\frac{68}{22400}\) × 10g of H2O2
But 10 ml of O2 at N.T.P. are produced from 1 ml of 10 volume
H2O2 solution
Thus 1 ml of 10 volume H2O2 solution contains \(\frac{68}{22400}\) × 10g of H2O2
∴ 100 ml of 10 volume H2O2 solution will contain \(\frac{68}{22400}\) × \(\frac{10}{1}\) x 100 = 3.036g
Thus, a 10 volume H2O2 solution is approx. 3% alternatively, 1000 ml of 10 volume
H2O2 will contain \(\frac{68}{22400}\) × 10 × 1000 = 30.36g
Therefore, strength of H2O2 in 10 volume
H2O2 = 30.36gL-1
