select the correct answer.\nhow can we increase the rate of collisions between the reactants in this…

select the correct answer.\nhow can we increase the rate of collisions between the reactants in this reaction?\nmg + 2hcl → mgcl₂ + h₂\n\na. increase the concentration of h₂ in the reaction mixture.\nb. decrease the temperature of the reactants in the reaction mixture.\nc. increase the concentration of mg in the reaction mixture.\nd. decrease the temperature of the entire reaction mixture.\ne. decrease the concentration of hcl in the reaction mixture.

select the correct answer.\nhow can we increase the rate of collisions between the reactants in this reaction?\nmg + 2hcl → mgcl₂ + h₂\n\na. increase the concentration of h₂ in the reaction mixture.\nb. decrease the temperature of the reactants in the reaction mixture.\nc. increase the concentration of mg in the reaction mixture.\nd. decrease the temperature of the entire reaction mixture.\ne. decrease the concentration of hcl in the reaction mixture.

Answer

Answer:

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

Explanation:

Step1: Understand collision - theory basics

Increasing reactant concentration increases collision rate.

Step2: Analyze each option

  • Option A: $H_2$ is a product, not a reactant, so increasing its concentration won't increase reactant - reactant collisions.
  • Option B: Decreasing temperature slows down particle motion, reducing collision rate.
  • Option C: Increasing $Mg$ (a reactant) concentration will lead to more $Mg$ particles, increasing collision rate with $HCl$.
  • Option D: Decreasing temperature of the mixture slows down particle motion, reducing collision rate.
  • Option E: Decreasing $HCl$ (a reactant) concentration will lead to fewer $HCl$ particles, reducing collision rate.