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Chapter 12

Chapter 12; Stoichiometry: key ideas and concepts

QuestionAnswer
How do chemists use balanced chemical equations? Chemists use balanced chemiscal equations as a basis to calculate how much reactant is needed or how mush product will be formed in a reaction.
What is stoichiometry? the calculations of quantities in chemical reactions
In terms of what quantities can you intercept a balanced chemical equation? a balanced chemical equation can be intercepted in terms of different quantities , including number of atoms, molecules or moles mass or volume.
What is a mole ratio? a conversion factor derived from the coefficients of a balanced chemiscal equation (interpreted in terms of moles)
How are mole ratios used in chemical calculations? they are used tp convert between a given number of moles of a reactant or product to moles of a different reactant or product.
What are the three steps in solving a stoichiometry problem? 1) convert to moles 2) find the mole ratio 3) convert to something else
Limiting reagent: the reactant that determines the amount of product that can be formed by a reaction.
Excess reagent: the reactant that is not completely used up in a reaction.
Theoretical yield: the maximum amount of product that can be formed from given amounts of reactants.
Actual yield: the amount of product that actually forms when the reaction is carried out.
Percent yield: the ratio of the actual yield to the theoretical yield expressed as a percent.
Created by: jmhschemistry
 

 



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