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If the rate of a reaction is directly proportional to the concentration of one r

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Question: If the rate of a reaction is directly proportional to the concentration of one reactant raised to the power of 3, what is the order of the reaction? (2023)

Options:

  1. Zero
  2. First
  3. Second
  4. Third

Correct Answer: Third

Solution: 

The order of the reaction is third because the rate is proportional to the concentration raised to the power of 3.

If the rate of a reaction is directly proportional to the concentration of one r

Practice Questions

Q1
If the rate of a reaction is directly proportional to the concentration of one reactant raised to the power of 3, what is the order of the reaction? (2023)
  1. Zero
  2. First
  3. Second
  4. Third

Questions & Step-by-Step Solutions

If the rate of a reaction is directly proportional to the concentration of one reactant raised to the power of 3, what is the order of the reaction? (2023)
  • Step 1: Understand what 'order of the reaction' means. It refers to how the rate of a reaction depends on the concentration of the reactants.
  • Step 2: Identify the given information. The question states that the rate of the reaction is directly proportional to the concentration of one reactant raised to the power of 3.
  • Step 3: Recognize that if the concentration of a reactant is raised to a power, that power indicates the order of the reaction with respect to that reactant.
  • Step 4: Since the concentration is raised to the power of 3, this means the reaction is third order.
  • Step 5: Conclude that the overall order of the reaction is 3.
  • Reaction Order – The order of a reaction indicates how the rate is affected by the concentration of reactants, with the exponent representing the order.
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