Question

How can we increase the rate of collisions between the reactants in this reaction?

Mg + 2HCl → MgCl2 + H2

A.
Increase the concentration of H2 in the reaction mixture.
B.
Decrease the temperature of the reactants in the reaction mixture.
C.
Increase the concentration of Mg in the reaction mixture.
D.
Decrease the temperature of the entire reaction mixture.
E.
Decrease the concentration of HCl in the reaction mixture.

Answer 1

C. Increase the concentration of Mg in the reaction mixture.

Step-by-step explanation:

Answer 2

Answer: Option (C) is the correct answer.

Step-by-step explanation:

According to collision theory, more is the number of collision between the reactant molecules more will be the rate of reaction.

For example,
`Mg + 2HCl \rightarrow MgCl_(2) + H_(2)`

When we increase the concentration of reactants then it means there is increase in number of molecules. Hence, more is the number of molecules more will be the number of collisions.

Thus, we can conclude that by increasing the concentration of Mg in the reaction mixture we increase the rate of collisions between the reactants in this reaction.