AP®︎ Chemistry: Topic 7.11 Flashcards

Master key terms and definitions for Topic 7.11 of AP Chemistry – Introduction to Solubility Equilibria to help you prep for quizzes and the AP exam.

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Term

Solubility-Product Constant (Ksp)

Definition

The equilibrium constant for a sparingly soluble ionic compound dissolving into its ions.

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Solubility-Product Constant (Ksp)
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The equilibrium constant for a sparingly soluble ionic compound dissolving into its ions.

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Solubility Equilibrium
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A dynamic equilibrium between an undissolved salt and its dissolved ions in a saturated solution.

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Saturated Solution
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A solution containing the maximum dissolved solute possible at equilibrium under given conditions.

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Molar Solubility
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The number of moles of a substance that dissolve per liter of solution.

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Writing a Ksp Expression
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Include only dissolved ion concentrations, each raised to its stoichiometric coefficient; omit solids.

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Stoichiometry in Solubility Calculations
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Ion coefficients in the dissolution equation determine concentration relationships used in Ksp calculations.

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Relative Solubility and Ksp
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Larger Ksp usually means greater solubility, but comparisons require matching dissolution stoichiometry.

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Solubility Rules and Ksp
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Salts with Ksp greater than 1 are generally soluble, while smaller values indicate limited solubility.

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Ksp and Molar Solubility Calculations
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Use dissolution stoichiometry to relate ion concentrations and solubility in equilibrium calculations.

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Solubility
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The maximum amount of solute that dissolves in a given amount of solvent.

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