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CBSE Class 12 Chemistry Notes: Chemical Kinetics – Half Life

by Anand Meena
April 22, 2019
in 12th Class, Class Notes
Reading Time: 1min read
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Half life of first order:

Time required to consume the half of initial concentration of reactant is called half life period.

At half life time:

Thus half life period is independent of initial concentration.

Unit of rate constant is time-1.

Reciprocal of rate const. (half life) is average life.

After ‘n’ half times the concentration A= A0/2n

Examples:

T75 = 2 ´ t50. i.e. time  taken to complete 75 % of reaction is twice that of half life time.

Examples of First Order Reactions:

Half life of Nth Order Reaction:
For nth order reaction the mathematical expression:

Chemical Kinetics of population growth:

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Tags: 12 Chemistry12 Class ChemistryCBSE NotesChemistry for Class 12Class 12 NotesClass 12thClass XII ChemistryFree NotesXII Class

Anand Meena

Full time entrepreneur, likes to indulge in writing reviews about the latest technologies apart from helping students in career and exam related topics.

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