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# Explain Half Life of a reaction.

Explain Half Life of a reaction.

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Half- life of a reaction: The time taken for a reaction, when  half  of the starting material has reacted is called half- life of a reaction.

For first order reaction $t_{\large\frac(1}{2}} = \large\frac{0.693}{K}$

where k is rate constant.

It is independent of initial concentration for first order reaction.

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It is the time in which the concentration of reactant reduce to half of its initial con.