c103-sp10-0426 - Chemistry 103 Spring 2010 Today 1 Lewis...

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Chemistry 103 Spring 2010 Today 1. Lewis acids and bases. 2. Choosing buffers based on pKa. Announcements 1. Ch. 16 OWL homework is active. 2. Next midterm exam on May 17 or 19. 3. CSULA closure on May 21 (furlough). 4. CSULA closure on May 31 (holiday). 5. Bring textbook and calculator to each lecture.
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Chemistry 103 Spring 2010 2 More advanced concept of acids and bases Bronsted-Lowry acid : donates H + (any solvent). Ex: HCl, CH 3 COOH. Bronsted-Lowry base : accepts H + (any solvent). Ex: NaOH, NH 3 , CH 3 COO - . Lewis acid : accepts an electron pair (any solvent). Ex: H + , Ag + , BF 3 , Cu 2+ . Lewis base : donates an electron pair (any solvent). Ex: OH - , Cl - , NH 3 . BF 3 (g) + NH 3 (g) BF 3 NH 3 (g) Al(OH) 3 (s) + OH - (aq) [Al(OH) 4 ] - (aq)
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Chemistry 103 Spring 2010 3 complex ion : metal ion acting as a Lewis acid and bonded to one or more Lewis bases; sometimes called coordination complexes, metal complex, etc. coordinate covalent bond : a bond formed when a Lewis base donates an electron pair into the empty orbital of a Lewis acid.
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