Chem208_Lecture_20_Rev_BW - - the solubility of a slightly...

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1 Today: Complexation Equilibria (18-8, 24-8) Thermodynamics ?? (Chapter 19) Exam coverage: Chapters 15–18, 24 PS8 due by 2:00 Tomorrow Exam II: Tuesday, 4/8, 7:30-9:00 Room Assignments are shown on Tuesday’s handout
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2 Review Session Schedule: All in Baker 200 Saturday, 2:00–4:00 Sunday, 12:00 noon–2:00 Chemistry 008 Sunday, 6:00–7:30 (Review questions for the 008 session are posted on Chemistry 008 Blackboard)
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3 Complex Ion Formation An example of Lewis Acid/Base Chemistry Complex ions form in a step-wise process Calculate the solubility of AgCl( s ) in pure water (K sp = 1.8 x 10 –10 )
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4 Calculate the solubility of AgCl( s ) in 6.0 M NH 3 ( aq ) (K form = 1.8 x 10 –10 for Ag(NH 3 ) 2 + ( aq )) Complex ion formation removes free ions from solution in the same way that precipitation does.
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5 Review Common Ion Effect
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Unformatted text preview: - the solubility of a slightly soluble ionic compound is lowered in the presence of a second solute that furnishes a common ion. - the solubility of a slightly soluble ionic compound is increased by the presence of a species that reacts with one of the ions formed during the dissolving process 6 7 Spontaneous Changes A spontaneous change is a change that, once begun, has a tendency to occur without being driven by an external influence. A spontaneous change does not necessarily occur rapidly. 8 Thermodynamics What determines whether a process will proceed spontaneously? H 2 O ( l ) H 2 ( s ) or H 2 O ( s ) H 2 ( l ) 2 H 2 ( g ) + O 2 ( g ) 2 H 2 ( i ) or 2 H 2 O ( l ) 2 H 2 ( g ) + O 2 ( g )...
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Chem208_Lecture_20_Rev_BW - - the solubility of a slightly...

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