(a)[1]
Deduce the time taken to collect 35 cm$^3$ of oxygen gas.
(b)[2]
Draw a line on the grid to show how the volume of oxygen gas produced changes as time increases.
(c)[2]
Describe the effect each of the following has on the rate of decomposition of hydrogen peroxide. The reaction is done at a higher temperature. The reaction is done using a lower concentration of hydrogen peroxide.
(d)[1]
Hydrogen peroxide reduces sodium chlorate(I), NaClO, to sodium chloride. $\text{H}_2\text{O}_2 + \text{NaClO} \rightarrow \text{NaCl} + \text{H}_2\text{O} + \text{O}_2$ Describe how this equation shows that sodium chlorate(I) has been reduced.