Question

What is rate constant ? Write 'two applications' of rate law.

Answer 1

The rate constant of a chemical reaction is defined as the rate of the reacton when concentration of all reactants are unity, i.e., $1$ mole / litre, for e.g., for a reaction,
$A⟶$ Products
Rate, $R=k\left[A\right]$
if $\left[A\right]=1mol{l}^{-1}$, then
$k=R$
where, $k$ = Rate constant or proportionality constant.
The rate constant is the rate of the reaction when all the concentrations are set equal to unity.
The applications of rate law are :
(a) It can be used to estimate the rate of a reaction for any given composition of the reaction mixture.
(b) It can be used to predict the mechanism of a complex reaction.