'Factors affecting acid strength' diaporamas de présentation

Acids & Bases

Acids & Bases. Unit 13. Overview. Acid/base properties Definitions Arrhenius Bronsted-Lowry Lewis Acid-Base Reactions Neutralization Sulfides Carbonates pH/ pOH Scale Acid/base strength Factor affecting K a , K b , K w Percent ionization. Vocabulary Polyprotic Acids

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Chapter 16 Acids and Bases

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Weak Acids & Bases

Weak Acids & Bases. Chapter 16. Dissociation Constants. Since weak acids do not dissociate completely, [H 3 O + ] ? [acid] For a generalized acid dissociation, the equilibrium expression would be This equilibrium constant is called the acid-dissociation constant, K a. K c =.

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Calculating Percent Ionization

[H 3 O + ] eq [HA] initial. Calculating Percent Ionization. Percent Ionization = ? 100 In this example [H 3 O + ] eq = 4.2 ? 10 ? 3 M [HCOOH] initial = 0.10 M. 4.2 ? 10 ? 3 0.10. Calculating Percent Ionization. Percent Ionization = ? 100.

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Final 3 Topics (brief)

Final 3 Topics (brief). Indicators Polyprotic Acids Structural Factors That Affect Acid Strength. Indicators change color in a range around their pK a. Indicators are acids (HA) that have a different color between HA and its conjugate base, A - (one of these may be colorless)

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Chapter 16

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All cations except act as __________ in aqueous solutions, e.g.,

pH. Al 3+ (aq) + 3 H 2 O(l) Al(OH) 3 (aq) + 3 H + (aq). the cations do NOT affect pH. Most cations free-up H + ions. All cations except act as __________ in aqueous solutions, e.g.,. weak acids. --. A. B. pH = 7. A. B. pH > 7. B. A. pH < 7.

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