The rate of reaction in terms of the \"rate law expression\" includes the rate c

Question

The rate of reaction in terms of the "rate law expression" includes the rate constant (k), the concentration of the reactants, and the orders of the reaction with respect to the different reactants.

Consider the following reaction:

A+BC+D

The initial concentrations of the reactants A and B are 0.240 M and 0.380 M, respectively.

The rate of reaction is 0.060 Ms1, and the orders of the reaction, with respect to reactants Aand B, are 1 and 2, respectively.

Determine the rate constant (k) for the reaction using the rate law.

Express your answer in M2s1 to three significant figures.

Explanation / Answer

Given-

Rate of the reaction = k[A][B]2

Rate = 0.060Msec-1

[A] = 0.240M

[B] = 0.380M

Putting the values in the rate expression-

0.060M/sec = k*0.240M*(0.380M)2

k = 0.060M/sec / 0.240M*0.1444M2

k = 0.060Msec-1/0.03466M3

k = 1.73M-2sec-1

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