The initial concentration of reactant in a first-order reaction is 0.27 m. the rate constant for the reaction is 0.75 s-1. what is the concentration (mol/l) of reactant after 1.5 s?

The concentration in mol/l of reactant after 1.5 s is calculated as follows

from first order integrated equation

In (A) t = - Kt + In (A) o where

At = final concentration = ?

A) o = initial concentration = 0.27 M

K = constant=0.75

T=temperature = 1.5 s

in (A) t = - 0.75 (1.5) + in (0.27)

In (A) t = - 1.125 + - 1.31 = - 2.435

In (A) t = - 2.435

In (A) t = e

find the e value

(A) t is therefore = 0.0876 mol/l