Question

13.17 Consider the reaction A + B - products From the following data obtained at a certain tem- perature, determine the order of the reaction and cal- culate the rate constant: [A] (M) [B](M) 1.50 1.50 3.00 1.50 2.50 1.50 Rate (M/s) 3.20 x 10-1 3.20 X 10-1 6.40 X 10-1

Answer 1

see experiment 1 and 3:

[A] doubles

[B] is constant

rate doubles

so, order of A is 1

see experiment 1 and 2:

[A] is constant

[B] changes

rate is constant

so, order of B is 0

overall order = 1 + 0 = 1

Rate law is:

rate = k*[A]

Put values from 1st row of table in rate law

rate = k*[A]

0.32 = k*1.5

k = 0.213 s-1

Answer:

Order = 1

K = 0.213 s-1