AP®︎ Chemistry: Topic 4.2 Flashcards

Master key terms and definitions for Topic 4.2 of AP Chemistry – Net Ionic Equations to help you prep for quizzes and the AP exam.

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Term

Aqueous Solution

Definition

A mixture in which a substance is dissolved in water and written with the phase symbol (aq).

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Aqueous Solution
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A mixture in which a substance is dissolved in water and written with the phase symbol (aq).

4.2.A
Dissociation of Soluble Ionic Compounds
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When dissolved in water, soluble ionic compounds separate into their individual aqueous ions.

4.2.A
Solubility Rule Assessed on AP Chemistry
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All sodium, potassium, ammonium, and nitrate salts are soluble in water.

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Molecular Equation
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A reaction written with compounds shown as intact formulas rather than separated aqueous ions.

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Complete Ionic Equation / Total Ionic Equation
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A reaction written with all strong electrolytes in solution separated into their aqueous ions.

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Net Ionic Equation
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A reaction showing only the species that actually change, with spectator ions omitted.

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Spectator Ions
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Ions present in solution that appear unchanged on both sides of the ionic equation.

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What to Dissociate in Ionic Equations
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Dissociate soluble aqueous ionic compounds; do not split solids, liquids, gases, or weak electrolytes.

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Writing a Net Ionic Equation
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Balance the reaction, dissociate soluble aqueous species, cancel spectator ions, and keep phases shown.

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Physical Change Equation
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A symbolic representation of a phase change or dissolution without forming new substances.

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Precipitation Reaction and Precipitate
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An aqueous reaction that forms an insoluble solid product that separates from solution.

4.2.A
Balanced Chemical Equation
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A symbolic reaction showing equal atoms and total charge on both sides.

4.2.A4.2.A.2