Given the data below, find the value of k.

Question

Given the data below for the reaction, 2 A + 2 B + 4 C => D + E + 3 F

Experiment	Initial conc of A, mol/L	Initial conc of B, mol/L	Initial conc of C, mol/L	Initial rate, mol/L.s
1	0.1	0.1	0.2	2 x 10-3
2	0.2	0.3	0.2	1.2 x 10-2
3	0.3	0.1	0.2	6 x 10-3
4	0.4	0.3	0.6	2.4 x 10-2

Calculate the value of k to 3 significant figures.

(answer given was 0.200)

Answer 1

Exp. 1 and 3: first order in A

Exp 2 and 4: zero order in C

Exp 1 and 2: first order in B

rate = k[A][B]

k = rate/[A][B]

k = 2x10^-3/(0.1)(0.1)

k = 0.200 M^-1s^-1