
Warm-Up: Limiting, Excess Reactant, Percent Yield
Flashcard
•
Chemistry
•
11th Grade
•
Practice Problem
•
Hard
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1.
FLASHCARD QUESTION
Front
What is a limiting reactant?
Back
The limiting reactant is the substance that is completely consumed in a chemical reaction, determining the maximum amount of product that can be formed.
2.
FLASHCARD QUESTION
Front
How do you identify the excess reactant in a chemical reaction?
Back
By comparing the amount of each reactant to the stoichiometric ratio and identifying which reactant is present in excess.
3.
FLASHCARD QUESTION
Front
What is the stoichiometric ratio?
Back
The stoichiometric ratio is the ratio of the coefficients of reactants and products in a balanced chemical equation, used to determine the proportions of substances involved in a reaction.
4.
FLASHCARD QUESTION
Front
What is percent yield?
Back
Percent yield is a measure of the efficiency of a reaction, calculated as (actual yield / theoretical yield) x 100%.
5.
FLASHCARD QUESTION
Front
How do you calculate the theoretical yield?
Back
The theoretical yield is calculated using stoichiometry based on the balanced chemical equation and the amount of limiting reactant.
6.
FLASHCARD QUESTION
Front
What happens to the excess reactant after a reaction?
Back
The excess reactant remains unreacted after the reaction is complete.
7.
FLASHCARD QUESTION
Front
In the reaction 4NH3 + 5O2 → 4NO + 6H2O, which reactant is limiting if 6.30g of NH3 and 1.80g of O2 are used?
Back
To determine the limiting reactant, convert grams to moles and use the stoichiometric ratios from the balanced equation.
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