Lec-33-Chap-16-1 - Arrhenius Acid-Base Theory CHE 131...

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CHE 131 Lecture 33 – Bronsted-Lowry Acids and Bases Chapter 16: pp. 765-772; 785-789. Arrhenius Acid-Base Theory Arrhenius, Svante August • (1859-1927), Swedish chemist • 1903 Nobel Prize in chemistry acid - hydrogen ion (proton) donor base - hydroxide ion donor Bronsted-Lowry Acid-Base Theory acid - proton donor base - proton acceptor strong vs. weak acids and bases • strong - completely ionized • weak - partially ionized Brönsted-Lowry Acid-Base Systems Acid-Base Conjugate Pairs conjugate base => what results when an acid loses its proton conjugate acid => what results when a base gains its proton
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Water’s Role as Acid or Base Water acting as a Base HA + H 2 O Ù H 3 O + + A - acid base Water acting as an Acid B + H 2 O Ù BH + + OH - base acid p.765 p.766b Conjugate Acid-Base Pairs
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p.766a Relative Strengths of Acid and Bases Strong vs. Weak Acids and Bases strong acid • completely ionized weak acid • partially ionized Mixtures of Strong and Weak Acids • the presence of the strong acid retards the dissociation of the weak acid
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Lec-33-Chap-16-1 - Arrhenius Acid-Base Theory CHE 131...

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