An experiment was carried out to investigate the effect of concentration on the reaction:

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

The following data was obtained:

Trial	Initial [BrO3-] (mol/L)	Initial [Br-] (mol/L)	Initial [H+] (mol/L)	Initial Rate (mol/Ls)
1	0.10	0.10	0.10	8.0 x 10-4
2	0.20	0.10	0.10	1.6 x 10-3
3	0.20	0.20	0.10	3.2 x 10-3
4	0.10	0.10	0.20	3.2 x 10-3

a) Deduce and state the rate law equation for this reaction. Show your process/reasoning. [3]

b) Calculate the value of k, the rate constant with correct units. [2]