What do you understand by the rate law and rate constant of a reaction? Identity the order of a reaction if the units of its rate constant are:
`(i) L^(-1)"mol s"^(-1)" " (ii) "L mol"^(-1)s^(-1)`

Explanation

Rate law is the expression in which reaction rate is given in terms of molar concentration of reactants with each term raised to some power, which may or may not be the same as the stoichiometric coefficient of the reacting species in a blanced chemical equation.
Rate `prop [A]^(x)[B]^(y)`
or Rate `=k[A]^(x)[B]^(y)`
where k = rate constant
When `[A]=[B]=1`
Then, Rate = k
Thus, rate constant is the rate of the reaction when the concentration of each reactant in the reaction is unity.
Order of the reaction
(i) `L^(-1)"mol s"^(-1) -` Zero order. (ii) `"L mol"^(-1)s^(-1)-` Second order.