Afirst order reaction, a -> products, has a rate reaction of .00250 ms-1 when [a] = . 484 m. (a) what is the rate constant, k, for this reaction? (b) does t1/2 depend on the concentration

a)  The rate constant, k, for this reaction is

b) No does not depend on concentration.

Explanation:

Rate law says that rate of a reaction is directly proportional to the concentration of the reactants each raised to a stoichiometric coefficient determined experimentally called as order.

Given: Order with respect to = 1

Thus rate law is:

a)

k= rate constant

The rate constant, k, for this reaction is

b) Expression for rate law for first order kinetics is given by:

where,

k = rate constant  

t = age of sample

a = let initial amount of the reactant  

a - x = amount left after decay process  

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

Thus does not depend on concentration.

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