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What is Half life of a reaction ?...

What is Half life of a reaction ?

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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 ` t_(1//2)` For the first order reaction
`k = ( 2.303)/(t) log""([R]_(0))/([R]) " at " t_(1//2) [R] = ([R]_(0))/(2)`
So the above equation becomes
` k = ( 2 . 303)/( t) log "" ([R]_(0))/(([R]_(0))/(2))`
(or) ` t_(1//2) = ( 2 . 303)/( k) ` log 2
(or) ` t_(1//2) = ( 2 . 303)/( k) xx 0.3010`
` t_(1//2) = (0.693)/(k)`
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