Question

which will increase the rate of a chemical reaction? adding a catalyst decreasing the pressure decreasing the temperature removing a catalyst

Explanation:

• A catalyst lowers the activation energy of a chemical reaction, allowing more reactant molecules to have sufficient energy to overcome the energy barrier and react. This increases the rate of reaction.
• Decreasing pressure (for gaseous reactions) reduces the frequency of collisions between reactant molecules, decreasing the reaction rate.
• Decreasing temperature reduces the kinetic energy of reactant molecules, so fewer molecules have enough energy to react, decreasing the reaction rate.
• Removing a catalyst would increase the activation energy (back to its original value without the catalyst), decreasing the reaction rate.

Answer:

adding a catalyst