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Solubility

Solubility. Write the equilibrium expression for AgCl Ag + + Cl -. Solubility. The amount of one substance that will dissolve in another. Precipitation. When dissolved particles join together forming a new phase and exit the solution. Precipitate (ppt).

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Solubility

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  1. Solubility

  2. Write the equilibrium expression for AgCl Ag+ + Cl-

  3. Solubility • The amount of one substance that will dissolve in another

  4. Precipitation • When dissolved particles join together forming a new phase and exit the solution

  5. Precipitate (ppt) • The new phase that forms and leaves the solution

  6. Ppt Examples • Water vapor combining to form rain • Dissolved ions combining to form a solid

  7. Saturated Solution • When the maximum amount of one substance is dissolved in another

  8. Precipitation • When more than the maximum amount of solute is added to a solution, a ppt will form

  9. Solubility Product MX(s) M+(aq) + X-(aq) Ksp =[M+][X-]

  10. Solubility Product MX2(s) M+2(aq) + 2 X-(aq) Ksp =[M+2][X-]2

  11. Solubility Calculations

  12. Calculate the solubility of BaSO4(s) • Ksp = 1.2 x 10-10

  13. Calculate the solubility of SrCr2O7(s) • Ksp = 2.5 x 10-13

  14. Solubility Product BaSO4(s) Ba+2(aq) + SO4-2(aq) Ksp =[Ba+2][SO4-2]

  15. Calculate the solubility of PbI2(s) • Ksp = 8.0 x 10-9

  16. Calculate the solubility of Mn2S3(s) • Ksp = 1 x 10-98

  17. Solubility Concepts AgI(s) Ag+ + I- Ksp = [Ag+][I-] at Eq. Qsp = [Ag+][I-] init.

  18. Solubility Concepts • If Qsp > Ksp a precipitate will form • If Qsp < Ksp no precipitate will form

  19. Common Ion Effect • Solubility of a solid is reduced when one of its ions is already in solution

  20. 150 mL 0.010 M KI is added to 100 mL 0.010 M Pb(NO3)2. Ksp for PbI2 = 8.0 x 10-9 • Will a ppt form?

  21. Common Ion Solubility Calculations

  22. Calculate the solubility of AgI(s) • Ksp = 1.5 x 10-16

  23. Calculate the solubility of AgI(s) in 0.10 M NaI • Ksp = 1.5 x 10-16

  24. Calculate the solubility of MZ2(s) in • 0.20 M M(NO3)2 Ksp = 2.0 x 10-16

  25. Calculate the solubility of M2Z3(s) in • 0.20 M M(NO3)3 Ksp = 2.0 x 10-16

  26. Aqueous NaI is added (dropwise) to a solution of 0.10 M AgNO3(s) & 0.10 M CuNO3 AgI Ksp = 1.0 x 10-16 CuI Ksp = 5.1 x 10-12

  27. Aqueous KCl is added (dropwise) to a solution of 0.10 M AgNO3(s) & 0.10 M Hg2(NO3)2 • AgCl Ksp = 1.8 x 10-10 • Hg2Cl2 Ksp = 5.1 x 10-12

  28. Review

  29. Calculate the solubility of PbS(s) • Ksp = 1.0 x 10-28

  30. Calculate the solubility of PbCl2(s) • Ksp = 1.6 x 10-5

  31. Calculate the solubility of Sc(OH)3(s) • Ksp = 2.0 x 10-31

  32. Calculate the solubility of AgI(s) in 0.20 M NaI • Ksp = 1.5 x 10-16

  33. The solubility of MX2(s) is 2.0 x 10-5 M. Calculate itsKsp

  34. Aqueous MgCl2 is added (dropwise) to a solution of 0.10 M KOH& 0.10 M K2SO4 • Mg(OH)2 Ksp = 6.0 x 10-6 • MgSO4 Ksp = 5.6 x 10-5

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