If the rate of reaction of 01 m sodium cyanide with 01 m 2...

If the rate of reaction of [0.1 M] sodium cyanide with [0.1 M] 2-bromo-2-methylpropane is 1.2 x 10-3 M/s, what would be the effect on the overall rate if the concentration of sodium cyanide is increased to [0.2 M] and the concentration of the alkyl bromide is decreased to [0.05 M]? a) the rate will increase by a factor of 2 b) the rate will decrease by a factor of 2 c) the rate will increase by a factor of 10 d) the rate will decrease by a factor of 10 e) the rate will remain unchanged

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Transcript

00:01 In this question we are discussing about an sn2 reaction.

00:04 Okay.

00:05 So here it is given that the rate of a reaction for an sn2 reaction can be written as rate is equal to rate constant multiplied by the concentration of alkyl halide multiplied by the concentration of the nucleophile.

00:21 Okay.

00:22 So here we are having an alkyl halide and the nucleophile over here is a cyano group.

00:27 Okay.

00:27 Now the initial concentration is given as the concentration of alkyl halide is equal to 0 .1 molar concentration.

00:38 We also have the concentration of the cyano group and that is equal to 0 .1 molar concentration.

00:44 Okay.

00:45 So in that case the rate is given as 1 .2 multiplied by 10 to the power negative 3 molar per second.

00:54 Okay.

00:54 Now the question is if we are having the concentration of the alkyl halide as 0 .2 which means it is doubled and for the case of the nucleophile concentration it is 0 .05 then how will the rate change? that is your question here.

01:13 Okay.

01:14 So let's see the answer for the question.

01:16 Now initially we were having the rate as rate is equal to rate constant multiplied by alkyl halide multiplied by the concentration of nucleophile.

01:26 Now the new rate...

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