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The rate of a reaction is defined as the change in concentration of a reactant o

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Question: The rate of a reaction is defined as the change in concentration of a reactant or product per unit time. What is the general form of the rate equation? (2023)

Options:

  1. Rate = k[A]^n
  2. Rate = k[A][B]
  3. Rate = k[A]^2[B]
  4. Rate = k[A] + [B]

Correct Answer: Rate = k[A]^n

Exam Year: 2023

Solution: 

The general form of the rate equation is Rate = k[A]^n, where n is the order of the reaction.

The rate of a reaction is defined as the change in concentration of a reactant o

Practice Questions

Q1
The rate of a reaction is defined as the change in concentration of a reactant or product per unit time. What is the general form of the rate equation? (2023)
  1. Rate = k[A]^n
  2. Rate = k[A][B]
  3. Rate = k[A]^2[B]
  4. Rate = k[A] + [B]

Questions & Step-by-Step Solutions

The rate of a reaction is defined as the change in concentration of a reactant or product per unit time. What is the general form of the rate equation? (2023)
  • Step 1: Understand that the rate of a reaction measures how fast reactants turn into products.
  • Step 2: Know that concentration refers to how much of a substance is present in a certain volume.
  • Step 3: Realize that the rate equation shows the relationship between the rate of reaction and the concentration of reactants.
  • Step 4: The general form of the rate equation is written as Rate = k[A]^n.
  • Step 5: In this equation, 'Rate' is the speed of the reaction, 'k' is a constant that depends on the reaction, '[A]' is the concentration of a reactant, and 'n' is the order of the reaction which tells us how the rate depends on the concentration.
  • Rate of Reaction – The rate of a reaction quantifies how quickly reactants are converted into products, typically expressed as the change in concentration over time.
  • Rate Equation – The rate equation relates the rate of a reaction to the concentration of reactants, incorporating a rate constant (k) and the order of the reaction (n).
  • Order of Reaction – The order of a reaction (n) indicates how the rate is affected by the concentration of reactants, which can be determined experimentally.
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