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The following reaction is a single-step, bimolecular reaction CH Br NaOH CH, OH+

ID: 940160 • Letter: T

Question

The following reaction is a single-step, bimolecular reaction CH Br NaOH CH, OH+ NaBr When the concentrations of CH3Br and NaoH are both 0.120 M, the rate of the reaction is 0.0020 M/s. (a) What is the rate of the ction if the concentration of CH3Br is doubled? Number 2 x 10 M/ s (b) What is the rate of the reaction if the concentration of NaOH is halved? Number M/ s 5 x 10 (c) What is the rate of the reaction if the concentrations of CH3Br and NaOH are both increased by a factor of four? Number 1.8 x 10 M/ s

Explanation / Answer

he has already given it is abimolecular reaction

rate is first order with respect to CH3Br

so if you double theconcentration rate also will be double

= 2x 0.002

= 0.004 or

= 4.0 x 10-3 M/s

similarly if you the caocentration rate also will be half

rate = 0.002 / 2

= 0.001

1.0 x 10-3 M/s

both increased 4 times means rate will be 42 = 16 times will increase

16 x 0.002

= 3.2 x 10-2 M/s