Role of a catalyst in a chemical reaction is to:
Correct answer: D. Increase rate of a reaction
- A. Decreases yield of a reaction
- B. Decreases rate of a reaction
- C. Increase yield of product
- D. Increase rate of a reaction
Explanation
A catalyst is a substance that speeds up a chemical reaction, but is not consumed by the reaction; hence a catalyst can be recovered chemically unchanged at the end of the reaction it has been used to speed up, or catalyze.
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About Reaction Kinetics
Reaction kinetics relates reaction rate to concentration, temperature, surface area and catalysts. Questions cover rate laws, reaction order, rate constants, activation energy and the activated complex, including how a catalyst lowers the activation energy without changing the overall energy change or equilibrium position.
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