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In a zero-order reaction, the rate of reaction is independent of the concentrati

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Question: In a zero-order reaction, the rate of reaction is independent of the concentration of the reactants. What is the unit of the rate constant (k) for a zero-order reaction? (2023)

Options:

  1. mol/L·s
  2. L^2/mol·s
  3. mol/L
  4. s^-1

Correct Answer: mol/L·s

Exam Year: 2023

Solution: 

For a zero-order reaction, the rate is constant and does not depend on the concentration of reactants. The unit of the rate constant (k) is mol/L·s.

In a zero-order reaction, the rate of reaction is independent of the concentrati

Practice Questions

Q1
In a zero-order reaction, the rate of reaction is independent of the concentration of the reactants. What is the unit of the rate constant (k) for a zero-order reaction? (2023)
  1. mol/L·s
  2. L^2/mol·s
  3. mol/L
  4. s^-1

Questions & Step-by-Step Solutions

In a zero-order reaction, the rate of reaction is independent of the concentration of the reactants. What is the unit of the rate constant (k) for a zero-order reaction? (2023)
  • Step 1: Understand that in a zero-order reaction, the rate of reaction does not change with the concentration of reactants.
  • Step 2: Recall that the rate of a reaction is expressed in terms of concentration change over time, typically in units of mol/L·s (moles per liter per second).
  • Step 3: Since the rate is constant in a zero-order reaction, the rate can be represented as k, the rate constant.
  • Step 4: Therefore, the unit of the rate constant (k) must match the unit of the rate, which is mol/L·s.
  • Zero-Order Reactions – In zero-order reactions, the rate of reaction remains constant regardless of the concentration of reactants.
  • Rate Constant Units – Understanding how to derive the units of the rate constant (k) based on the order of the reaction.
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