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Homework Help: chemistry

Posted by elvis on Saturday, February 18, 2012 at 9:21pm.

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.

Need some help



chemistry - DrBob222, Friday, February 17, 2012 at 10:04pm
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



chemistry - elvis, Saturday, February 18, 2012 at 8:33pm
dosent answer the question?

need step by step solution and answer because i have no idea how to do this!

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