Define the following symbols that are encountered in rate equations: [A]0, t1/2 [A]t, k.

A rate equation can be written based on the rate constant k, concentration of reactants and half life time t1/2 of reactant if given. [A⁰] is the initial concentration of reactant A and  [A]t be the final concentration.

What is rate of reaction?

Rate of a reaction is the rate of decrease in concentration of reactants or rate of increase in concentration of products. Rate of the reaction written in terms of molar concentration of reactants is called the rate law.

Consider the simplest reaction A gives B. Here the only one reactant is A. The molar concentration of A is written as [A]. The rate constant k is then,

k = [B] / [A]

If any coefficients attached with them it is written as power of the concentration term. Now, the rate of the above reaction is written as follows:

rate r = k [A]

Sometimes the initial and final concentrations of A can be considered. Where, [A⁰] is the initial concentration and [A]t be the final concentration.

The half life t1/2 is the time taken to consume half of the reactants concentration.

To find more about rate law, refer the link below:

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