For reaction: A + B → Products, the rate if the reaction at various concentration are given below:
Expt. No.(A)(B)Rate10.20.2220.20.4430.60.436
Rate=k[A]2[B]
Let the rate law be r=k[A]x[B]y
Divide (2) by (1)
∴2=[2]y,y=1
Divide (3) by (2)
∴9=(3)x,x=2
Hence rate equation, R=k[A]2[B]1