Question

There is a sample of 10 volume of hydrogen peroxide solution. Calculate its strength.

• A. 3.00%
• B. 4.045%
• C. 2.509%
• D. 3.035%

Answer 1

Answer: (D)

3.035%

Answer 2

$\lbrack H_{2}O_{2} \rightarrow H_{2}O + \frac{1}{2}O_{2}\rbrack \times 2$

$\underset{68g}{2H_{2}O_{2}} \rightarrow 2H_{2}O + O_{2}$ 22.4 litre at N.T.P.

$\because$ 22.4 litre $O_{2}$ at N.T.P. obtained by 68 gm of $H_{2}O_{2}$

10 litre $O_{2}$ at N.T.P. obtained by $\frac{68}{22.4} \times 10 = 30.35gm/litre$

∴1000 ml $O_{2}$ at N.T.P. obtained by = 30.35 gm

∴100 ml $O_{2}$at N.T.P. obtained by $= \frac{30.35}{1000} \times 100 = 3.035\%$.