What is the primary purpose of adding a catalyst to a chemical reaction?

• A. To supply energy to the reactants
• B. To increase the equilibrium constant of the reaction
• C. To change the products formed in the reaction
• D. To increase the rate of the reaction without being consumed

Answer: (D)

Verified step by step guidance

1. Understand that a catalyst is a substance that increases the rate of a chemical reaction without being consumed in the process.
2. Recognize that a catalyst works by providing an alternative reaction pathway with a lower activation energy, making it easier for reactants to convert into products.
3. Note that a catalyst does not supply energy to the reactants directly; instead, it lowers the energy barrier that must be overcome for the reaction to proceed.
4. Remember that a catalyst does not change the equilibrium constant or the final composition of products; it only helps the system reach equilibrium faster.
5. Conclude that the primary purpose of adding a catalyst is to increase the reaction rate without altering the reactants, products, or equilibrium position.