Why does a higher concentration increase the rate of reaction?

Question

a
It increases the frequency of collisions.
b
It lowers the activation energy.
c
It increases the surface area of the particles
d
It decreases the amount of reactants.

Answer 1

The correct answer is:

a. It increases the frequency of collisions.

A higher concentration of reactants means that there are more particles available in a given volume, leading to a higher frequency of collisions between the reactant molecules. This increase in collisions can lead to a higher rate of reaction, as more effective collisions can result in the formation of products. The other options do not accurately explain why higher concentration affects the rate of reaction in the same way.