Multiple Choice
In a chemical reaction, which of the following components is most likely to be the limiting reagent if a drought affects the availability of resources?
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3. Chemical Reactions
Limiting Reagent
Multiple Choice
In a chemical reaction, which substance is completely consumed first and thus determines when the reaction stops?
A
Catalyst
B
Excess reagent
C
Limiting reagent
D
Product
Verified step by step guidance1
Understand the concept of a limiting reagent: In a chemical reaction, the limiting reagent is the substance that is completely consumed first, limiting the amount of product formed and determining when the reaction stops.
Recognize that a catalyst is not consumed in the reaction; it only speeds up the reaction without being used up.
Identify that an excess reagent is the substance present in a greater amount than necessary, so it remains after the reaction is complete.
Know that products are formed as a result of the reaction and are not reactants that get consumed.
Therefore, the limiting reagent is the correct answer because it controls the extent of the reaction by being the first to run out.
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