Question

# A particular reactant decomposes with a half-life of 189 s when its initial concentration is 0.257...

A particular reactant decomposes with a half-life of 189 s when its initial concentration is 0.257 M. The same reactant decomposes with a half-life of 189 s when its initial concentration is 0.753 M.
A) Determine the reaction order.
B) Calculate the rate constant.

A) Determine the reaction order.
The order of reaction is zero because it only depends on the decomposition of reactive particularly different types of concentration so that is not a function of a catalyst.

The representation of [A] versus t gives a straight slope - k ordered in the
origin 0 [A].
These reactions occur in the case of heterogeneous reactions in which
reaction rate is independent of the concentration of reactants.

B) Calculate the rate constant.

t 1/2= [A]0/2K

k= [A]0/2t 1/2

k=[0.257]0/ 2* 189 s

k=6.79*10-4 M/s

...

k=[0.753]0/ 2* 189 s

k=1.99*10-3 M/s

#### Earn Coins

Coins can be redeemed for fabulous gifts.