If a catalyst is added to a reaction:
I.the value of k is increased
II.the value of k is decreased
III.the rate is increased
IV.the rate is decreased
V.neither rate nor the constant are changed,only the order

Question

Quizplus · Accepted Answer

Adding a catalyst increases the rate of the reaction by decreasing the activation energy required for the reaction to occur. This increase in rate is reflected in the value of the rate constant k, which increases as well. Therefore, statement I is true. However, the addition of a catalyst does not change the overall stoichiometry of the reaction or the order with respect to the reactants. This means that the value of k is not affected by the addition of a catalyst, so statement V is false. Finally, since the rate of the reaction increases with a catalyst, statement IV is false and statement III is true. Therefore, the correct answer is D.

If a Catalyst Is Added to a Reaction