Question

an increase in concentration of reactants will:
a. increase the rate of reaction
b. decrease the rate of reaction
c. increase the activation energy
d. decrease the activation energy

Explanation:

According to the collision theory, when the concentration of reactants increases, there are more reactant particles per unit volume. This leads to a higher frequency of effective collisions between reactant molecules. Since the rate of a chemical reaction is related to the frequency of effective collisions, a higher concentration of reactants will increase the rate of reaction. Activation energy is a property related to the nature of the reaction and the presence of catalysts (if any), and it is not affected by the concentration of reactants.

Answer:

A. Increase the rate of reaction