Question

Which of the following is NOT a way to speed up a chemical reaction? (Select all that apply)(1 point)
Responses

increasing the temperature of one of the reactants
increasing the temperature of one of the reactants

decreasing the surface area of one of the reactants
decreasing the surface area of one of the reactants

decreasing the temperature of one of the reactants
decreasing the temperature of one of the reactants

increasing the concentration of one of the reactants

Answer 1

Select:
- decreasing the surface area of one of the reactants
- decreasing the temperature of one of the reactants

Reason: both decrease collision frequency or kinetic energy of molecules, so they slow the reaction. Increasing temperature or concentration speeds it up.