Question

How does an increase in reactant concentration affect the rate of reaction?

It leads to more frequent collisions, which increase reaction rate.
It leads to less frequent collisions, which increase reaction rate.
It leads to more frequent collisions, which decrease reaction rate.
It leads to less frequent collisions, which decrease reaction rate.

Answer 1

Option A is the correct option.

In terms of the collision theory, increasing the concentration of a reactant increases in the number of collisions between the reacting species per second and therefore increases the reaction rate.