Question

For a reaction \(a\text{A}+b\text{B}\rightarrow\) Products, the rate law is found to be: Rate \(=k[\text{A}][\text{B}]^{2}\). What is the overall order of the reaction?

• A. \(3\)
• B. \(2\)
• C. \(1\)
• D. \(0\)

Hint:

Add the powers of the concentration terms in the rate law.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept
The overall order is the sum of the powers of the concentration terms in the experimental rate law. It does not depend on the stoichiometric coefficients.

Step 2: Read the powers
Rate \(=k[\text{A}]^{1}[\text{B}]^{2}\): order in A is 1 and order in B is 2.

Step 3: Add
Overall order \(=1+2=3\)

Final Answer:
The reaction is third order overall. \[ \boxed{\text{(A) }3} \]