Question

For a reaction, $A+B\to$ product the rate law is given by, $r=k\left[A{]}^{1/2}\right[B{]}^2$. What is the order of the reaction ?

Answer 1

Given, For $A+B\to$ Product
$r=k\left[A{]}^{1/2}\right[B^2]$

Order of reaction
The order of the reacion is sum of the
powers on respective concentration of the
reactants in rate law expression
Hence order $=\frac{1}{2}+2=0.5+2=2.5$

Final answer:

Order of reaction is $2.5$.