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5. The rate law equation for the reaction,

BrO₃^- + 3SO₃^2-  Br^- + 3SO₄^2- ,

is Rate = [BrO₃^-][SO₃^2-][H⁺].

The first step of the mechanism is:

SO₃^2- + H⁺  HSO₃^- (fast)

The second step of the mechanism is rate-determining. Write the reactant(s) only for the second step.

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Hello there,

I am unsure if this is allowed, but I multiplied the fast, first step by 4.

Since the substances in the rate law must appear as reactants in step (2), the reactants for my second step are simply: BrO₃^- + SO₃^2- + H⁺.

According to my modified step (1) and derived step (2), I will arrive at the overall reaction.

Thank you for your help.