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Ch 6: Chemical Equilibrium

Ch 6: Chemical Equilibrium. 6-1: Equilibrium constant 6-2: Equilibrium and thermodynamics  G and Le Chatelier’s 6-3: K sp solubility product 6-4: Complex Formation 6-5: Acids and Bases 6-6: pH 6-7: Strength of Acids and Bases 6-8: Solving Equilibrium problems.

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Ch 6: Chemical Equilibrium

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  1. Ch 6:Chemical Equilibrium 6-1: Equilibrium constant 6-2: Equilibrium and thermodynamics • G and Le Chatelier’s 6-3: Ksp solubility product 6-4: Complex Formation 6-5: Acids and Bases 6-6: pH 6-7: Strength of Acids and Bases 6-8: Solving Equilibrium problems

  2. Exp 5: Ni(DMG)2 Add acids(HCl and HNO3) and heat to dissolve metal Adjust to appropriate pH (neutralize HCl and HNO3 with NH3) Add DMG Adjust pH / create buffer soln (add NH3 until pH~10) Digest (~30 minutes) Filter ppt using Gooch crucibles Determine mass of ppt Determine %Ni in unknown sample (use stoich.)

  3. Supersaturation – When solution contains more solute than should be present at equilibrium Adsorption – attached to surface Absorption – penetration beyond the surface Digestion – period of standing in presence of mother liquid. • Promotes slow recrystallization • Particle size increases • Impurities expelled

  4. pages 124-125 in textbook

  5. pages 124-125 in textbook

  6. pages 124-125 in textbook

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