Question

The strength of $11.2$ volume solution of $H_2O_2$ is : [Given that molar mass of $H = 1\, g$ $mol^{-1}$ and $O = 16\, g\, mol^{-1}]$

• A. $13.6\%$
• B. $3.4\%$
• C. $34\%$
• D. $1.7\%$

Answer 1

Answer: (B)

$3.4\%$

Answer 2

$\underset{\text{68 g/L}}{ {2H2O2}}$ ${->2H2O \,+}$ \underset{\text{22.4of O_2 (STP)}}{ {O2 ?}} 11.2 L of O is given by 34 g of HO present in 1 L of HO solution. So % strength of HO $=\frac{34}{1000}\times100=3.4g/100mL=3.4\%$