Question

How is strength of H2O2 expressed???

Answer 1

Volumetric: In this way, the strength is expressed as the volume of oxygen gas liberated from one unit of H2O2 liquor under standard condition (i.e. N.T.P.) ... But 50% H2O2 is most widely used. If 50 gm H2O2 is present in 100cc solution, then it will be called 50% H2O2.

Answer 2

The strength of hydrogen peroxide is expressed in terms of the volume of oxygen liberated from it.

• Hydrogen peroxide is a disinfectant and bleaching agent.
• Its effectiveness is based on the release of oxygen. So the strength of hydrogen peroxide is quantified based on the amount of oxygen released.
• The volume strength of hydrogen peroxide indicates the amount of oxygen released by a unit volume of the solution at standard temperature and pressure.
• If a solution of H₂O₂ is graded as 5vol, it indicates that one ml of it can liberate 5 ml of oxygen.