Lect+22+08 - Next Three Chapters Application of Equilibrium...

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Next Three Chapters: Application of Equilibrium Principles Acid/Base Equilibria (2 - 3 lectures) Reading Chapter 15: sections 15.1 - 15.7 Solubility/Precipitation Equilibria (1-2 lecture) Reading Chapter 16: sections 16.1 - 16.4 Electrochemistry (3 lectures) Reading Chapter 17 sections17.1-17.5
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Lecture 22 Goals You will have a plain language understanding of Bronsted-Lowry and Lewis acid-base classification schemes You will have a plain language understanding of acid-base strength. You will be able to calculate the pH of acid - base solutions You will have a plain language understanding of weak acid-weak base equilibria
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Bronsted - Lowry Acids/Bases Bronsted - Lowry Acids donate hydrogen ions Bronsted - Lowry Bases accept hydrogen ions CHOOH(aq) + H 2 O(l) H 3 O + (aq) + CHOO - (aq) acid 1 base 2 acid 2 base 1 conjugate pairs formic acid H 2 O(l) + NH 3 (aq) NH 4 + (aq) + OH - (aq) acid 1 base 2 acid 2 base 1 conjugate pairs Non Aqueous acid-base HCl(in NH 3 ) + NH 3 (l) NH 4 + (in NH 3 ) + Cl - (in NH 3 ) acid 1 base 2 acid 2 base 1 conjugate pairs Amphoteric - a molecule that can acts as an acid or a base depending on reaction partner
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Lewis Acids/Bases A Lewis Acid accepts an electron pair A Lewis Base donates an electron pair BF 3 (g) + NH 3 (g) BF 3 NH 3 (g) acid base acid-base adduct ( coordinate covalent bond formed) SnCl 4 (l) + 2Cl - (aq) SnCl 6 (aq) acid base acid-base adduct Acid Anhydride and Base Anhydride - formed by removing water from the acid or base .
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