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Can someone please explain to me how to find the rate law of the reaction? Do yo

ID: 1082686 • Letter: C

Question

Can someone please explain to me how to find the rate law of the reaction? Do you have to use an equation or is there another easier way?

Use the following experimental data to answer next THREE questions. These questions refer to reaction: A+3B 2C + D Initia Rateofdisappearanceof!AIM/sec) 3.67 x 106 7.34 x 10 -TrialTInitial1(M)1 Initial LBI(M) 0.015 0.200 0.030 0.200 0.015 2 0.400 14.7 x 106 2. Rate law of this reaction is: a. Rate kA][B b. Rate = k[A]2 d..- e c. Rate k[B] Rate = k[A][BF Rate = k[A]2[B]

Explanation / Answer

see experiment 1 and 2:
[A] doubles
[B] is constant
rate doubles
so, order of A is 1

see experiment 1 and 3:
[A] is constant
[B] doubles
rate becomes 4 times
so, order of B is 2

Rate law is:
rate = k*[A]*[B]^2

Answer: d