May 21st, 2007

Hydrogen peroxide decomposes according to the equation: 2H_{2}O_{2} –> 2H_{2}O + O_{2}

If you start with 100 volume H_{2}O_{2} then 1 dm^{3} of solution will release 100 dm^{3} oxygen (at RTP)

This means that 1 litre of H_{2}O_{2} solution releases 100/24 moles of oxygen and as 2 moles of H_{2}O_{2} decompose to release 1 mole of oxygen then there must be 2 x 100/24 moles of H_{2}O_{2} in the solution

This is equal to 8.33 mol/dm^{3}

## An IB chemistry discussion including resources and useful links