The reaction between acetone and bromine in acid solution isrepresented by the e

ID: 860935 • Letter: T

Question

The reaction between acetone and bromine in acid solution isrepresented by the equation

CH3OCH3(aq) +Br2(aq) + H3O+(aq ) ---->products

The tabulated kinetic data were gathered. Basedon these data, the experimental rate law is

Initial Concentrations,M; Initial Rates, Ms-1

Exp CH3OCH3 Br2 H3O+ Rate

1 0.30 0.050 0.050 5.8 x 10-5

2 0.30 0.100 0.050 5.8 x 10-5

3 0.30 0.050 0.100 1.2 x 10-4

4 0.40 0.050 0.200 3.2 x 10-4

What is the rate law?

Please EXPLAIN

keeping all other chemical`s conc. same consider followng cases:

1) only conc. of br2 is doubled we see from qs. that no change in rate i.e. rxn is zero order wrt br2

2)only conc. of h30+ is doubled we see from qs. that rate gets 2 times i.e. rxn is 1st order wrt h30+

3)now we know R =K[CH3OCH3]^X [BR2]^0 [H30+];

APPLYING THIS FOR LAST EQN WE GET X=1.375

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