Lecture 09 - Slide 1 2003 By Default! Experiment Nein!...

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© 2003 By Default! A Free sample background from www.awesomebackgrounds.com Slide 1 Experiment Nein! Experiment Nein! Acid Acid ­ ­ Base Base Equilibria Equilibria CH 204 CH 204 Fall 2008 Fall 2008 Dr. Brian Anderson Dr. Brian Anderson
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© 2003 By Default! A Free sample background from www.awesomebackgrounds.com Slide 2 Last Week Last Week Heat in chemical reactions: Heat in chemical reactions: heat is a measurable quantity heat is a measurable quantity produced and consumed in produced and consumed in stoichiometric stoichiometric amounts amounts Heat Capacity (J/K): Heat Capacity (J/K): how much heat is required to raise the temperature how much heat is required to raise the temperature of something by one degree Celsius (or 1 Kelvin) of something by one degree Celsius (or 1 Kelvin) Specific Heat Capacities (J/ Specific Heat Capacities (J/ gK gK ): ): Lead 0.128 Iron 0.449 Water 4.184 Lead 0.128 Iron 0.449 Water 4.184 Hess’s Law Hess’s Law
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© 2003 By Default! A Free sample background from www.awesomebackgrounds.com Slide 3 This week This week Weak acid titration. Weak acid titration. Determine K Determine K a of acetic acid by a couple of acetic acid by a couple different methods. different methods. Witness the awesome power of a buffer Witness the awesome power of a buffer solution to resist changes in pH. solution to resist changes in pH.
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© 2003 By Default! A Free sample background from www.awesomebackgrounds.com Slide 4 Non Non ­ ­ Equilibrium Reaction Equilibrium Reaction Reaction goes to completion. Reaction goes to completion. HCl HCl H H + + + Cl Cl KNO KNO 3 K K + + NO + NO 3 CH CH 4 + 2O + 2O 2 CO CO 2 + 2H + 2H 2 O O
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© 2003 By Default! A Free sample background from www.awesomebackgrounds.com Slide 5 Equilibrium Reaction Equilibrium Reaction Products react with each other Products react with each other to re to re ­ ­ form the reactants. form the reactants. PbSO PbSO 4 Pb Pb 2+ 2+ + SO + SO 4 2 CH CH 3 COOH CH COOH CH 3 COO COO + H + H + N N 2 (g) (g) + 3H + 3H 2 (g) (g) 2 NH 2 NH 3 (g) (g)
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© 2003 By Default! A Free sample background from www.awesomebackgrounds.com Slide 6 Equilibrium Expression Equilibrium Expression K K a = = [H [H + ][A ][A ] ] [HA] [HA] For any equilibrium reaction, For any equilibrium reaction, aA aA + + bB cC bB cC + + dD dD For a weak acid dissociation, For a weak acid dissociation, HA H HA H + + A + A K K eq eq = = [C] [C] c [D] [D] d [A] [A] a [B] [B] b products products reactants reactants
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This note was uploaded on 12/17/2009 for the course CH 310 N taught by Professor Blocknack during the Spring '08 term at University of Texas at Austin.

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Lecture 09 - Slide 1 2003 By Default! Experiment Nein!...

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