Catalysis is the change in speed (rate) of a chemical reaction due to the help of a catalyst. Unlike other chemicals which take part in the reaction, a catalyst is not consumed by the reaction itself. A catalyst may participate in many chemical reactions. Catalysts that speed the reaction are called positive catalysts. Catalysts that slow the reaction are called negative catalysts, or inhibitors. Substances that increase the activity of catalysts are called promoters, and substances that deactivate catalysts are called catalytic poisons.
Catalysis
Questions and Answers
Q: What is catalysis?
A: Catalysis is the change in speed (rate) of a chemical reaction due to the help of a catalyst.
Q: Is a catalyst consumed by the reaction itself?
A: A catalyst is not consumed by the reaction itself.
Q: How many chemical reactions can a catalyst participate in?
A: A catalyst may participate in many chemical reactions.
Q: What are positive catalysts?
A: Catalysts that speed the reaction are called positive catalysts.
Q: What are negative catalysts or inhibitors?
A: Catalysts that slow the reaction are called negative catalysts, or inhibitors.
Q: What are promoters?
A: Substances that increase the activity of catalysts are called promoters.
Q: What are catalytic poisons?
A: Substances that deactivate catalysts are called catalytic poisons.