Question:
For a reaction, $\mathrm{A}+\mathrm{B} \rightarrow$ Product; the rate law is given by, $r=k[\mathrm{~A}]^{1 / 2}[\mathrm{~B}]^{2}$. What is the order of the reaction?
Solution:
The order of the reaction $=\frac{1}{2}+2$
$=2 \frac{1}{2}$
= 2.5