Question 2 of 17 SaplingLearning macmilan learning The following is a multi-step

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Question 2 of 17 SaplingLearning macmilan learning The following is a multi-step reaction. The rate-limiting step is unimolecular, with A as the sole reactant. A+B C+D f [Aj and [B) are both 0.200 M, then the rate of reaction is 0.0020 Mis. (a) What is the rate of the reaction if [A] is doubled? Number M/s (b) Starting with the original concentrations, what is the rate of the reaction if [B] is halved? Number M/s (c) Starting with the original concentrations, what is the rate of the reaction if [A and [B are both increased by a factor of five? Number M/s Hint O Previous Give Up & View Solution Check Answer 0 Next- Exit-

Explanation / Answer

From the information given, that the rate-limiting step is unimolecular with A as the sole reactant, the rate law for the reaction is:

Rate = k[A]

a) If you double [A], the rate will double.

2 x 0.0020 M/s = 0.0040 M/s.

b) The concentration of B has no effect on the rate, so halving [B] will not change the rate. It remains 0.0020 M/s.

c) Increasing [A] 5-fold will increase the rate 5-fold.

5 x 0.0020 M/s = 0.01 M/s

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