객관식
Which statement best describes the role of a catalyst in a chemical reaction?
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15. Chemical Kinetics
Catalyst
객관식
Which type of substance is commonly used to increase the decomposition rate of hydrogen peroxide (H_2O_2)?
A
Inhibitor
B
Reactant
C
Solvent
D
Catalyst
검증된 단계별 안내1
Understand the role of each substance type in a chemical reaction: a reactant is consumed during the reaction, a solvent dissolves substances but does not change the reaction rate, an inhibitor slows down the reaction, and a catalyst increases the reaction rate without being consumed.
Recall that hydrogen peroxide (H_2O_2) naturally decomposes into water and oxygen, but this process can be slow under normal conditions.
Identify that a catalyst is a substance that speeds up the decomposition of hydrogen peroxide by providing an alternative reaction pathway with a lower activation energy.
Recognize common catalysts for H_2O_2 decomposition, such as manganese dioxide (MnO_2) or catalase enzyme, which increase the rate without being consumed.
Conclude that the substance type used to increase the decomposition rate of hydrogen peroxide is a catalyst.
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