35 mL sample of hydrogen peroxide gives of 500 mL of O 2 at 27°C and 1 atm pressure. Volume strength of H 2 O 2 sample will be :-

Question

35 mL sample of hydrogen peroxide gives of 500 mL of O 2 ​ at 27°C and 1 atm pressure. Volume strength of H 2 ​ O 2 ​ sample will be :-

TestHub · Accepted Answer

Step 1: Find the moles of O₂ using the ideal gas law: $n = \frac{P V}{RT} = \frac{1 a t m \times 0.5 L}{0.0821 L . a t m / m o l . k \times 300 K} \approx 0.0203 m o l es$

Step 2: From the decomposition reaction (2H₂O₂ → 2H₂O + O₂), moles of H₂O₂ =

2 \times 0.0203 = 0.0406 m o l es

.

Step 3: Calculate the molarity ( $M$ ) of the solution: $M = \frac{m o l es}{V o l u m e in L} = \frac{0.0406 m o l es}{0.035 L} \approx 1.16 M$ .

Step 4: Calculate the volume strength using the formula: $V o l u m e St re n g t h = 11.2 \times M = 11.2 \times 1.16 \approx 12.8volumes$ (Option B).

Chemistry - Concentration Terms Question with Solution | TestHub

Options:

Doubts & Discussion