Zero order reaction means that the rate of the reaction is proportional
to zero power of the concentration of reactants Consider the reaction,
R ® P
Rate = 



0
d R
R
d
k
t


As  any quantity raised to power zero is unity
Rate = 

d R
1
d
k ×
t


d[R] = – k dt
Integrating both sides
[R]
= – k t + I
(3 5)
where, I is the constant of integration At  t = 0, the concentration of the reactant R = [R]0, where [R]0 is
initial concentration of the reactant