Bromate(V) ions react with bromide ions in acidic solution to form bromine.

BrO₃^–(aq) + 5Br ^–(aq) + 6H⁺(aq) → 3Br₂(aq) + 3H₂O(l)

a. Suggest two methods of following the progress of this reaction. For each method explain your answer.

b. The initial rates of reaction were compared using the initial concentrations of reactants shown in the table.

i. Deduce the order of reaction with respect to each reactant. In each case, show your reasoning.

ii. Deduce the rate equation for this reaction.

iii. State the units of the rate constant, k, for this reaction.

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Experiment [Bro, 1/mol dm3 [Br]/mol dm-3 (H*]/mol dm Relative rate of formation of bromine 1 0.040 0.20 0.24 1 2 0.040 0.20 0.48 4 3 0.080 0.20 0.48 4 0.040 0.10 0.48