AP®︎ Chemistry: Topic 8.11 Flashcards

Master key terms and definitions for Topic 8.11 of AP Chemistry – pH and Solubility to help you prep for quizzes and the AP exam.

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Term

pH-Sensitive Solubility

Definition

Solubility changes with pH when a salt contains a weak acid/base ion or OH−.

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pH-Sensitive Solubility
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Solubility changes with pH when a salt contains a weak acid/base ion or OH−.

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Acidic Solution Effect on Salts with Basic Anions
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Lower pH increases solubility when the anion is the conjugate base of a weak acid.

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Basic Solution Effect on Salts with Acidic Cations
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Higher pH increases solubility when the cation is the conjugate acid of a weak base.

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Le Châtelier's Principle in pH and Solubility
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Removing a dissolved acidic or basic ion shifts dissolution right; adding it shifts dissolution left.

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Weak Acid and Weak Base Ions vs Strong Acid/Base Ions
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Conjugates of weak acids or bases react with H+ or OH−; conjugates of strong acids or bases are insignificant.

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pH-Neutral Salts
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Salts made from insignificant ions have solubilities largely unaffected by pH alone.

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Hydroxide Salt Solubility and pH
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Lower pH increases hydroxide salt solubility, while higher pH decreases it by common-ion effect.

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