e following is a multi-step reaction. The rate-limiting step is unimolecular, wi
ID: 693853 • Letter: E
Question
e following is a multi-step reaction. The rate-limiting step is unimolecular, with A as the sole reactant. A+B C+D If [A] and [B] are both 0.110 M, then the rate of reaction is 0.0060 M/s. (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 doubled? 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 three? Number M/sExplanation / Answer
a)
Given Rate law is:
rate = k[A]
rate new / rate old = ([A]new/[A]old)
[A]new/[A]old = 2
putting values
rate new / rate old = 2
rate new / 0.006 = 2
rate new = 0.012 M/s
Answer: 0.0120 M/s
b)
since rate doesn’t depends on B
it will not change
Answer: 0.0060 M/s
c)
B will not effect
tripling [A] will triple the rate
rate new / rate old = 3
rate new / 0.006 = 3
rate new = 0.018 M/s
Answer: 0.018 M/s
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