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Question

The half-life period for a first-order reaction is


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Solution

Half-life

  • The half-life of a reaction is the time in which the concentration of a reactant is reduced to one-half of its initial concentration.
  • It is represented as t1/2.

Half-life period for first order

  • For a first-order reaction, the half-life period is constant.
  • It is independent of the initial concentration of the reacting species.

Expression for the half-time period for first order

  • The equation for the half-time period is as follows:-

t1/2=0.693k

  • Here, k is the rate constant and t1/2 is the half-time period.

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