Rate kN 2 O g 0. For a zero order reaction the formula is t½ Ao 2k. The half-life of a zero-order reaction decreases as the initial concentration of the reactant in the reaction decreases.
T ½ 0693 k For a second order reaction 2A products or A B products when A B rate kA 2.
The half-life of a reaction is the time required to decrease the amount of a given reactant by one-half. Half-Life of a Zero Order Reaction The timescale in which there is a 50 reduction in the initial population is referred to as half-life. T 12 0693k For a second-order reaction the formula for the half-life of the reaction is. 244 t 1 2 ln.