Lecture_Notes_100509b

Lecture_Notes_100509b - { [PbCl 3 ]-(aq) + 3 OH-(aq)...

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Selective Precipitation y A solution contains 1.5 x 10 -4 M of both Mg 2+ and Ba 2+ ions. A source of OH - is added slowly to this solution, will Mg(OH) 2 (K sp = 8.9 x 10 -12 ) or Ba(OH) 2 (K sp = 5.0 x 10 -3 ) precipitate first? Specify the concentration of OH - necessary to begin precipitation of each salt.
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Complex Ion Equilibria y Complex Ion - a transition metal ion with ligands around it y Formation or Stability Constant – the equilibrium constant for formation of a complex ion by the addition of ligands to a metal ion in aqueous solution
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Complex Ion Equilibria y The formation of a complex ion takes place in a series of steps.
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Complex Ion Equilibria y Determine the equilibrium constant for the following reaction from the formation constants given below:
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Unformatted text preview: { [PbCl 3 ]-(aq) + 3 OH-(aq) [Pb(OH) 3 ]-(aq) + 3 Cl-(aq) { K f [PbCl 3 ]-= 2.4; K f = [Pb(OH) 3 ]-= 3.8 x 10 14 Complex Ion Equilibria y Calculate the concentration of Cu 2+ at equilibrium in 1.0 L of a solution that initially contains 1 x 10-3 mol copper (II) ions and 0.10 mol of NH 3 . (K f = 5.0 x 10 12 for [Cu(NH 3 ) 4 ] 2+ ) Can adding a ligand such as NH 3 increase the solubility of a salt such as Cu(OH) 2 ? Yes No 19% 81% 1. Yes 2. No Complex Ions and Solubility y Calculate the molar solubility of AgI in pure water. K sp = 1.5 x 10-16 y Calculate the molar solubility of AgI in 3.0 M NH 3 . The overall formation constant for Ag(NH 3 ) 2 + is 1.7 x 10 7 ....
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This note was uploaded on 10/14/2009 for the course CHEM 105BLG at USC.

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Lecture_Notes_100509b - { [PbCl 3 ]-(aq) + 3 OH-(aq)...

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