AP®︎ Chemistry: Topic 4.5 Flashcards

Master key terms and definitions for Topic 4.5 of AP Chemistry – Stoichiometry to help you prep for quizzes and the AP exam.

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Term

Balanced Chemical Equation

Definition

A reaction representation with equal numbers of each atom on both sides.

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Balanced Chemical Equation
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A reaction representation with equal numbers of each atom on both sides.

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Stoichiometric Coefficients
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Whole-number values in an equation that show relative mole amounts of substances.

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Mole Ratio
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A conversion factor from equation coefficients relating moles of one substance to another.

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Conservation of Mass in Stoichiometry
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Atoms are neither created nor destroyed, so reactant and product amounts are quantitatively related.

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Mass-to-Mass Stoichiometry
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Convert grams to moles, use a mole ratio, then convert back to grams.

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Particle-to-Particle Stoichiometry
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Use Avogadro's number and mole ratios to convert between numbers of particles.

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Gas Stoichiometry at STP
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Use 22.4 L/mol with mole ratios to relate gas volume and chemical amounts.

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Stoichiometry with the Ideal Gas Law
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Use PV = nRT to find gas moles, then apply mole ratios.

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Solution Stoichiometry
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Use molarity to find moles in solution, then apply mole ratios.

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Dimensional Analysis in Stoichiometry
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Set up conversion factors so unwanted units cancel and the target unit remains.

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Stoichiometry
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Using balanced equations and mole ratios to calculate reactant and product amounts.

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