It is an algebraic equation showing how the rate of the reaction depends on the molar concentrations of one or more reactants.
First-Order Reaction:
These are the reactions in which the rate of a reaction is determined by the variation of one concentration term only.
The rate law for a first-order reaction:
The rate law of first-order reaction states that the sum of the exponent is equal to 1.
“The reaction rate is directly proportional to the concentration of the reactants.”
A first-order reaction depends on the concentration of one reactant.
The rate law for a first-order reaction can be represented as:
Where ‘a’ is the initial concentration of a reactant, ‘x' is the number of moles per liter decomposing after time ‘t’ and ‘k’ is the rate constant for the first-order reaction.