select the correct answer. which statement is true of a catalyst? a. it behaves as a reactant in a chemical…
select the correct answer. which statement is true of a catalyst? a. it behaves as a reactant in a chemical reaction. b. it increases the temperature of a reaction. c. it decreases the concentration of the products. d. it accelerates the reaction rates of a mixture.
Answer
Explanation:
Step1: Recall catalyst definition
A catalyst is a substance that speeds up a chemical reaction without being consumed in the reaction.
Step2: Analyze option A
A catalyst is not a reactant as it is not used - up in the reaction, so A is false.
Step3: Analyze option B
A catalyst does not increase the temperature of a reaction. It provides an alternative reaction pathway with a lower activation energy. So B is false.
Step4: Analyze option C
A catalyst does not decrease the concentration of products. In fact, it helps in reaching the equilibrium faster without changing the equilibrium concentrations. So C is false.
Step5: Analyze option D
By providing an alternative reaction pathway with lower activation energy, a catalyst accelerates the reaction rates of a mixture. So D is true.
Answer:
D. It accelerates the reaction rates of a mixture.