Question

For a first order reaction the initial concentration of reactant is 0.20 M . After 20 minutes the concentration is reduced to 0.011 M. Calculate the rate of reaction when the concentration of A is 0.005 M .

Answer 1

Explanation:

first-order reaction is a reaction that proceeds at a rate that depends linearly on only one reactant concentration.

The Differential Representation

Differential rate laws are generally used to describe what is occurring on a molecular level during a reaction, whereas integrated rate laws are used for determining the reaction order and the value of the rate constant from experimental measurements. The differential equation describing first-order kinetics is given below:

Rate=−d[A]dt=k[A]1=k[A](2.3.1)

The "rate" is the reaction rate (in units of molar/time) and k is the reaction rate coefficient (in units of 1/time). However, the units of k vary for non-first-order reactions. These differential equations are separable, which simplifies the solutions as demonstrated below.