What is a limiting reagent in a chemical reaction?
S2 Final Review

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Chemistry
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10th Grade
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1.
FLASHCARD QUESTION
Front
Back
The limiting reagent is the reactant that is completely consumed first in a chemical reaction, limiting the amount of product formed.
2.
FLASHCARD QUESTION
Front
Given the reaction Mg + 2HCl → MgCl2 + H2, which reactant is the limiting reagent if 6.00 moles of HCl and 5.00 moles of Mg are used?
Back
HCl is the limiting reagent because it will be consumed before Mg.
3.
FLASHCARD QUESTION
Front
What is a half-reaction in electrochemistry?
Back
A half-reaction is either the oxidation or reduction part of a redox reaction, showing the transfer of electrons.
4.
FLASHCARD QUESTION
Front
In the half-reaction Cu²⁺ + 2e⁻ → Cu, what is happening to copper?
Back
Copper is being reduced as it gains electrons.
5.
FLASHCARD QUESTION
Front
What is percent yield in a chemical reaction?
Back
Percent yield is the ratio of the actual yield to the theoretical yield, multiplied by 100.
6.
FLASHCARD QUESTION
Front
If a reaction predicts a yield of 32.4 grams but only 26.1 grams are produced, what is the percent yield?
Back
The percent yield is 80.6%.
7.
FLASHCARD QUESTION
Front
What is the half-life of a radioactive substance?
Back
The half-life is the time required for half of the radioactive atoms in a sample to decay.
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