Question 4 of 8 Sapling Learning The following is a multi-step reaction. The rat

Question

Question 4 of 8 Sapling Learning The following is a multi-step reaction. The rate-limiting step is unimolecular, with A as the sole reactant. If [A] and [B] are both 0.120 M, then the rate of reaction is 0.0040 M/s. (a) What is the rate of the reaction if(A] is doubled? Number (b) Starting with the original concentrations, what is the rate of the reaction if IB] is doubled? Number (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

Explanation / Answer

since rate at rate limiting step is directky proportional to the conc of A...

rate = K [A] ...(rate law)

hence if we double the coc of A

we will have rate doubled as well ...hence ,,

rate = 0 X0.004 = 0.008 M/s

2) No change since B is not included in the rate limiting step ....

so ...0.004M/s

3) since the rate depends only on the conc of A ...hence the rate will be five time the intial whenthe conc of the A is increased by five times

hence rate = 5 X 0.004 = 0.02 M/s

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