Question

what is the relationship between concentration and reaction rate? higher concentration decreases reaction rate. lower concentration increases reaction rate. higher concentration increases reaction rate. concentration has no effect on reaction rate.

Explanation:

In chemical reactions, according to the collision theory, when the concentration of reactants is higher, there are more reactant particles per unit volume. This leads to a greater number of effective collisions (collisions with proper orientation and sufficient energy) between reactant molecules. As a result, the rate at which the reaction proceeds (reaction rate) increases. For example, in a reaction \(A + B
ightarrow C\), if we increase the concentration of \(A\) (while keeping other factors like temperature, pressure, etc. constant), we will observe more \(A - B\) collisions, and thus the formation of \(C\) will be faster.

Answer:

Higher concentration increases reaction rate.