GCSE CHEMISTRY - Measuring the Rate of the Reaction of the Decomposition of Hydrogen Peroxide

Measuring the Rate of a Reaction.

3) The decomposition of hydrogen peroxide solution.

hydrogen peroxide oxygen + water.
2H₂O₂_(aq) O_2(g) + 2H₂O_(l)

The reaction is carried out in a closed flask
which has a gas syringe connected to the top of it.

The reaction is started by adding a catalyst to
the hydrogen peroxide. The catalyst is manganese(IV) oxide.

The volume of oxygen in the syringe increases as the
reaction proceeds.
The volume of oxygen can be noted every 30 seconds,
and a graph of volume against time can be plotted.
The gradient of the plot (the steepness of the slope)
shows how fast the reaction is going.

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