Trial A M B M Rate Ms Using the given data determine the rat

Trial [A] (M) [B] (M) Rate (M/s) Using the given data, determine the rate constant of this reaction. 0.210 0.260 0.0155 2 0.210 0.520 0.0155 3 0.420 0.260 0.0620 A+2B C+D Number Units 8 Select answer

Solution

1) order w.r.t A

r1/r2 = (a1/a2)^x

(0.0155/0.0620) = (0.21/0.42)^x

x = 2

order w.r.t B

(0.0155/0.0155) = (0.26/0.52)^y

y = 0

overall order = 2+0 = 2

rate law, rate = k[A]^2[B]^0

k = 0.0155/(0.21^2*0.26^0)

= 0.35 M-1.s-1

2)

order w.r.t A

r1/r2 = (a1/a2)^x

(0.0207/0.0311) = (0.27/0.405)^x

x = 1

order w.r.t B

(0.0207/0.11) = (0.26/0.598)^y

y = 2

overall order = 2+1 = 3

rate law, rate = k[A]^1[B]^2

k = 0.0207/(0.27^1*0.26^2)

= 1.134 M-2.s-1