Write these down some place where you can keep it until you can (a) derive them or (b) memorize them.
half life:
zero order is (Ao)/2a*k
order 1 is 0.693/ak
order 2 is 1/a*k*(Ao)
both a and k are constants; a is the coefficient and k is the rate contant.
(Ao) = initial concn
The half-life of a reaction was found to be inversely dependent on the concentration of the starting material. Thus, we can say that
a. the reaction is zero order b. the reaction is first order c. the reaction is second order
d. the reaction starts out first order and changes to second order after one half-life.
e. the reaction starts out second order and changes to first order after one half-life.
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