Question

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

Explanation:

To determine which factor increases the rate of a chemical reaction, we analyze each option:

• Decreasing temperature: Lowering temperature reduces the kinetic energy of particles, so reaction rate decreases.
• Removing a catalyst: Catalysts increase reaction rates by lowering activation energy; removing them would decrease the rate.
• Decreasing pressure: For reactions involving gases, lower pressure means fewer collisions, so reaction rate decreases.
• Adding a catalyst: Catalysts lower the activation energy, allowing more reactant particles to react, thus increasing the reaction rate.

Answer:

adding a catalyst