Question

What is meant by volume strength. Calculate the volume strength of 3% H₂O₂ solution

Answer 1

Dear Student,

Volume strength means the volume of oxygen gas liberated from one volume of H2O2 solution (at 0oC and 1 atm.)

Solution:
​​​​​​100 ml of H₂O₂ solution contain 3g of H₂O₂
so, 1000 ml of H₂O₂ solution will contain 30 g of H₂O₂

Consider the chemical equation.
2H₂O₂ --------> 2H₂O + O₂

Now 68 g of H₂O₂ give 22.4 L of O2 at NTP
So, 30g of H₂O₂ will give O2 at NTP = 22.46822.468 × 30 = 9.88 litres = 9880 ml

But 30g of H₂O₂ are present in 1000 ml of H2O2
Hence 1000 ml of H₂O₂ solution gives O₂ at NTP = 9880 ml

1 ml of H₂O₂ solution will give O2 at NTP = 9.88 ml

Hence the volume strength of 3% H2O2 solution = 9.88 (Answer)

Regards,