How is the volume measurement of hydrogen peroxide related to its molarity?

May 21st, 2007

Hydrogen peroxide decomposes according to the equation: 2H₂O₂ –> 2H₂O + O₂
If you start with 100 volume H₂O₂ then 1 dm³ of solution will release 100 dm³ oxygen (at RTP)
This means that 1 litre of H₂O₂ solution releases 100/24 moles of oxygen and as 2 moles of H₂O₂ decompose to release 1 mole of oxygen then there must be 2 x 100/24 moles of H₂O₂ in the solution
This is equal to 8.33 mol/dm³