A reaction between the substances A and B has been found to give the following d

Question

A reaction between the substances A and B has been found to give the following data: 3A+2B--->C+2D

[A] mol/L                 [B] mol/L         rate of appearance of C mol/L-hr

1.0 *10^-2                1.0                     0.30 *10^-6

1.0 *10^-2                3.0                     8.10 *10^-6

2.0 *10^-2                3.0                     3.24 *10^-5

Using the data above, determine the order of the reaction with respect to A and B, and the rate law. What is the value of k(with units) at this temperature?

Explanation / Answer

from the table 1-2 A is fixed concentration of B increase thrice rate will be 8.1/0.3 = 23

that means reaction is third order wrt to B

from 1-3 concentration of B is constant A is increased double rate will be 3.24 *10^-5 /8.10 *10^-6 = 4

that mens reaction is second order wrt to A

rate r = k [A]2 [B]3

put the all values in this equation

0.30 *10^-6 = k [1.0 *10^-2 ]2 [1.0 ]3

k = 0.30 *10^-6 / 1.0 *10^-4

k = 3 x 10^-3 M-4 s-1

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.