Volume Strength of $H_2 O_2$
x volume of H2O2 means x litre of O2 is liberated by 1 litre of H2O2 on decomposition
2H2O2 → 2H2O + O2
$68 gm \quad \quad \quad 22. 4 lit $ at STP
22.94lit (at STP) of O2 is given by 68 gm of H2O2
x litre of O2 is released from $ \frac{68 x}{22.4} $ gm of H2O2 $= \frac{17 x}{5.6}$
x lit of O2 is given by $= \frac{68 x}{22.4} = \frac{17 x}{5.6} $ (strength)
Strength, $\large S = \frac{17 x}{5.6} $
$\large Normality , N = \frac{S}{E} = \frac{17 x}{5.6 \times 34/2} = \frac{x}{5.6}$
$\large x = N \times 5.6$
$\large Molarity = \frac{1}{2}Normality = \frac{x}{11.2}$