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What is the order of a reaction if the rate law is given by rate = k[A]^2[B]?

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Question: What is the order of a reaction if the rate law is given by rate = k[A]^2[B]?

Options:

  1. 0
  2. 1
  3. 2
  4. 3

Correct Answer: 2

Solution: 

The order of the reaction is the sum of the exponents in the rate law. Here, it is 2 (from [A]^2) + 1 (from [B]) = 3.

What is the order of a reaction if the rate law is given by rate = k[A]^2[B]?

Practice Questions

Q1
What is the order of a reaction if the rate law is given by rate = k[A]^2[B]?
  1. 0
  2. 1
  3. 2
  4. 3

Questions & Step-by-Step Solutions

What is the order of a reaction if the rate law is given by rate = k[A]^2[B]?
  • Step 1: Identify the rate law given in the question, which is rate = k[A]^2[B].
  • Step 2: Look at the exponents of the concentration terms in the rate law.
  • Step 3: The exponent for [A] is 2, and the exponent for [B] is 1.
  • Step 4: Add the exponents together: 2 (from [A]^2) + 1 (from [B]) = 3.
  • Step 5: The total sum of the exponents gives you the order of the reaction.
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