Rates of Reaction
Measuring the Rate of a Reaction.
3) The decomposition of hydrogen peroxide solution.
peroxide oxygen + water.
2H2O2(aq) O2(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
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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