8)
Again, I  is the constant of integration and its value can be determined
easily When  t = 0, R = [R]0, where [R]0 is the initial concentration of the
reactant Therefore, equation (3 8) can be written as
ln [R]0 = –k × 0 + I
ln [R]0 =  I
Substituting the value of I in equation (3