## Dependence of Rate on Concentration – Class 12 | Chapter – 4 | Chemistry Short Notes Series PDF for NEET & JEE

Dependence of Rate on Concentration: The rate of a chemical reaction can depend on the concentration of the reactants. In general, the rate of a reaction increases as the concentration of the reactants increases. This is because a higher concentration of reactants means that there are more molecules available to collide and react with each other.

## Dependence of Rate on Concentration

The relationship between the rate of a reaction and the concentration of the reactants can be described by a mathematical equation, known as the rate law. The rate law expresses the rate of the reaction as a function of the concentrations of the reactants:

Rate = k[A]m[B]n

Where:

• Rate is the rate of the reaction
• k is the rate constant, which depends on the temperature, pressure, and presence of catalysts or inhibitors
• [A] and [B] are the concentrations of the reactants
• m and n are the reaction orders with respect to A and B, respectively, and indicate how the rate of the reaction depends on the concentration of each reactant

The values of m and n can be determined experimentally by measuring the rate of the reaction at different concentrations of A and B, and then fitting the data to the rate law equation. The sum of m and n is the overall reaction order, which indicates how the rate of the reaction depends on the total concentration of the reactants ([A] + [B]).

Overall, the concentration of the reactants is an important factor that can affect the rate of a chemical reaction, and can be described by the rate law equation.

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