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Chemistry 31 Monday, November 13, 2006

Chemistry 31 Monday, November 13, 2006 - Monday Chemistry...

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Monday, November 13, 2006 Chemistry ACID/BASE REACTIONS How can you tell if an acid/base reaction is extensive? How do you write a net equation for an acid/base reaction? Text: Section 12.4,12.6, and 12.8 THE PLAYERS 1. Up to now: a. Covalent compounds – molecules b. Ionic compounds- ions c. Neutral acids – schizophrenic i. Pure: molecules ii. In water: can react to form ions 2. “Primary species in solution” a. Depends on strength i. If strong- completely reacted What are the primary species (besides H2O) in a beaker of: HCl(aq) H 3 O 1+ and Cl 1- ions HF(aq) HF molecules NaOH(aq) Na 1+ and OH 1- NH 3 (aq) NH 3 molecules REACTIVITY 1. Compare two acids: a. stronger one better at giving away H 1+ Compare two bases b. Stronger one better at taking H 1+ 2. Does an extensive reaction occur? a. HF and NaCN i. Na 1+ a spectator 1. (not involved in H 1+ transfer) ii. CN1- a stronger base 1. will take H 1+ a. yes- extensive reaction b. NaF and HCN i. H 1+ already on stronger base 1. not an extensive reaction
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Monday, November 13, 2006 WRITING NET EQUATIONS 1. Products are conjugates of the reactants 2. Spectator ions not included
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