(a)[3]
A $35.0\,\text{cm}^3$ portion of $0.266\,\text{mol dm}^{-3}$ $\text{H}_2\text{O}_2$ is fully decomposed. Determine the volume of oxygen produced, measured at room temperature and pressure. Give your answer to two significant figures.
(b)[2]
Describe and explain how lowering the temperature affects the rate of this reaction.
(c)[2]
Describe and explain how increasing the concentration of hydrogen peroxide affects the rate of this reaction.
(d(i))[1]
An aqueous sample of hydrogen peroxide has a pH of 5.5. State which ion causes this pH value.
(d(ii))[2]
A pH meter is used to measure the pH of an aqueous solution. Describe one other method for measuring the pH of an aqueous solution.