What does the term catalyst mean?
When is the rate of reaction greatest?
Suggest one way to increase the reaction rate while using the same amounts of hydrogen peroxide and manganese(IV) oxide.
Calculate the amount of hydrogen peroxide, in moles, used in this experiment.
Use your answer to c(i) together with the equation to find the number of moles of oxygen formed in the reaction. $2\text{H}_2\text{O}_2(aq) \rightarrow 2\text{H}_2\text{O}(l) + \text{O}_2(g)$
Calculate the volume of oxygen produced at r.t.p.
What effect would increasing the mass of catalyst have on the volume of oxygen produced?
Work out the volume of oxygen that would be formed if $20\,\text{cm}^3$ of $0.2\,\text{mol dm}^{-3}$ hydrogen peroxide were used instead of $20\,\text{cm}^3$ of $0.1\,\text{mol dm}^{-3}$ hydrogen peroxide.
Describe how the second experiment is carried out. Make sure you state clearly how you would ensure that catalyst is the only variable.