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Drill: Determine the KQ/HQ ratio to make a buffer solution with a pH of 4.70 Ka for HQ = 3.0 x 10-5
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Drill: Calculate [H2Q], [HQ-], [Q-2], [H+], & pH of 0. 20 M KHQ
Drill: Calculate [H2Q], [HQ-], [Q-2], [H+], & pH of 0.20 M KHQ. Ka1 = 2.0 x Ka2 = 8.0 x 10-9
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Review Drill & Test
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CHM II HW Review PP-25 Complete the attached assignment & turn it in tomorrow
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Solubility
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The amount of one substance that will dissolve in another
Solubility The amount of one substance that will dissolve in another
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Precipitation When dissolved particles join together forming a new phase and exit the solution
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The new phase that forms and leaves the solution
Precipitate (ppt) The new phase that forms and leaves the solution
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Ppt Examples Water vapor combining to form rain
Dissolved ions combining to form a solid
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When the maximum amount of one substance is dissolved in another
Saturated Solution When the maximum amount of one substance is dissolved in another
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Precipitation When more than the maximum amount of solute is added to a solution, a ppt will form
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Write the equilibrium expression for AgCl(s) Ag+ + Cl-
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Solubility Product MX(s) M+(aq) + X-(aq) Ksp =[M+][X-]
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Solubility Product MX2(s) M+2(aq) X-(aq) Ksp =[M+2][X-]2
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Write the equation & equilibrium expression for:
Al2(SO4)3
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Solubility Calculations
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Calculate the solubility of BaSO4(s)
Ksp = 1.2 x 10-10
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Solubility Product BaSO4(s) Ba+2(aq) + SO4-2(aq) Ksp =[Ba+2][SO4-2]
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Calculate the solubility of SrCr2O7(s)
Ksp = 2.5 x 10-13
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Calculate the solubility of PbI2(s)
Ksp = 8.0 x 10-9
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Drill: Write the reaction & equilibrium expression when solid Fe2(SO4)3 is added to water.
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Drill: Calculate the solubility of M3X4 Ksp for M3X4 = 6.9 x 10-207
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AgI(s) Ag+ + I- Ksp = [Ag+][I-] at Eq. Qsp = [Ag+][I-] init.
Solubility Concepts AgI(s) Ag+ + I- Ksp = [Ag+][I-] at Eq. Qsp = [Ag+][I-] init.
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Solubility Concepts If Qsp > Ksp a precipitate will form
If Qsp < Ksp no precipitate will form
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150 mL 0. 010 M KI is added to 100 mL 0. 010 M Pb(NO3)2
150 mL M KI is added to 100 mL M Pb(NO3)2. Ksp for PbI2 = 8.0 x 10-9 Will a ppt form?
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AP CHM HW Read: Chapter 16 Problem: 13 Page: 463
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CHM II HW Read: Chapter 20 Problem: 17 Page: 843
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Drill: 10.0 mL M KCl is added to 15 mL M Pb(NO3)2. Ksp = 1.7 x 10-5 Will a ppt form?
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Drill: Calculate the solubility of AgI(s)
Ksp = 1.5 x 10-16
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Review Drill & Check HW
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CHM II HW Review PP-25 Complete the attached assignment & turn it in tomorrow.
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Calculate the solubility of Mn2S3(s)
Ksp = 1 x 10-98
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Common Ion Solubility Calculations
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Common Ion Effect Solubility of a solid is reduced when one of its ions is already in solution
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Calculate the solubility of AgI(s) in 0.10 M NaI
Ksp = 1.5 x 10-16
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Calculate the solubility of MZ2(s) in
0.20 M M(NO3)2 Ksp = 2.0 x 10-15
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Calculate the solubility of M2Z3(s) in
0.20 M M(NO3)3 Ksp = 2.0 x 10-16
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AP CHM HW Read: Chapter 16 Problems: 18 Page: 463
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CHM II HW Read: Chapter 20 Problems: 19 Page: 844
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Drill: Calculate the solubility of CaCO3 in water. Ksp = 4.9 x 10-15
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Calculate the solubility of PbI2(s) in 0.010 M NaI
Ksp = 3.2 x 10-8
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Aqueous NaI is added (dropwise) to a solution of 0. 10 M AgNO3(s) & 0
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
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Aqueous KCl is added (dropwise) to a solution of 0. 10 M AgNO3 & 0
Aqueous KCl is added (dropwise) to a solution of 0.10 M AgNO3 & 0.10 M Cu(NO3)2 AgCl Ksp = 1.8 x 10-10 CuCl2 Ksp = 5.1 x 10-12
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Test on Thursday or Friday
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Drill: Calculate the solubility of PbS(s)
Ksp = 1.0 x 10-28
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Review
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Calculate the solubility of PbCl2(s)
Ksp = 1.6 x 10-5
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Calculate the solubility of Sc(OH)3(s)
Ksp = 2.7 x 10-31
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Calculate the pH of Ca(OH)2 in solution.
Ksp = 4.0 x 10-6
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Calculate the pH of LiCO3 in soln
Ksp = 8.2 x 10-4 Ka1 = 4.4 x 10-7 Ka2 = 4.7 x 10-11
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Calculate the solubility of AgI(s) in 0.20 M NaI
Ksp = 1.5 x 10-16
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The solubility of MX2(s) is
2.0 x 10-5 M. Calculate its Ksp
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Aqueous MgCl2 is added (dropwise) to a solution of 0. 10 M KOH & 0
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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Drill: The solubility of YF3 is 2.0 x Calculate the value of Ksp.
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