Chemistry · May / June 2022 · Paper 12 · Question 20

Bromate, bromide and hydrogen ions react according to the equation shown. BrO$_3$$^-$(aq) + 5Br$^-$(aq) + 6H$^+$(aq) $\rightarrow$ 3Br$_2$(aq) + 3H$_2$O(l) Some apparatus for measuring how the rate of this reaction varies over time is suggested. 1 gas syringe 2 balance 3 pH meter Which apparatus is suitable to measure the rate of this reaction?

1. A1 and 2
2. B1 only
3. C2 and 3
4. D3 only

As printed in the paper