Multiple Choice
In the context of photosynthesis, what is the primary difference between an absorption spectrum and an action spectrum?
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3. Acids and Bases
Organic Chemistry Reactions
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Which of the following statements accurately describes the role of a catalyst in an organic chemistry reaction?
A
A catalyst increases the yield of the reaction by providing additional reactants.
B
A catalyst changes the equilibrium position of the reaction.
C
A catalyst increases the rate of reaction by lowering the activation energy.
D
A catalyst is consumed during the reaction and must be replenished.
Verified step by step guidance1
Understand the role of a catalyst: A catalyst is a substance that increases the rate of a chemical reaction without being consumed in the process.
Recognize that a catalyst works by providing an alternative reaction pathway with a lower activation energy, which allows more reactant molecules to have enough energy to react.
Clarify that a catalyst does not change the equilibrium position of a reaction. It only helps the system reach equilibrium faster.
Note that a catalyst is not consumed in the reaction, meaning it is not used up and does not need to be replenished.
Conclude that the correct statement is that a catalyst increases the rate of reaction by lowering the activation energy, without affecting the equilibrium position or being consumed.
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