[A] | [B] | Rate |
0.1 M | 0.1 M | 0.002 M s−1 |
0.2 M | 0.1 M | 0.002 M s−1 |
0.3 M | 0.2 M | 0.008 M s−1 |
0.4 M | 0.3 M | 0.018 M s−1 |
In experiments I and II, [B] is constant and [A] is doubled. The rate does not change. So order w.r.t. [A] = Zero.
Let rate = k[A]0[B]x
r2=0.002Ms−1=k[0.1]x
r2=0.008Ms−1=k[0.2]x
r3r2=4=(2)x
∴(2)2=(2)x
X = 2
So order w.r.t. [B] = 2
Rate = k[A]0[B]2