A Little Welcome Back Review

A Little Welcome Back Review.

1. Write the formula, complete, and net ionic equation.

Formula Equation: CaCl2(aq) + AgNO3(aq) → ______

Complete Ionic:

______

Net Ionic: ______

2. Separate the following ions from a solution

Pb2+ Ba2+ Sr2+

i) Add: Filter Out: Net Ionic equation:

ii) Add: Filter Out: Net Ionic equation:

iii) Add: Filter Out: Net Ionic equation:

Br- S2- PO43-

i) Add: Filter Out: Net Ionic equation:

ii) Add: Filter Out: Net Ionic equation:

iii) Add: Filter Out: Net Ionic equation:

3. Write the equilibrium equation and solubility product, Ksp, for each salt.

a) Ca(OH)2 (s)

d) (NH4)3PO4 (s)

4. Calculate the Ksp for CaCl2, if 50.0 g is required to saturate 25.0 mL of water.

5. Calculate the molar solubility of Mg(OH)2.

6. How many grams of BaSO4 are required to saturated a 1.5L solution at 25oC.

9. Write the formula, complete, and net ionic equation.

Formula Equation: CaCl2(aq) + 2AgNO3(aq) → Ca(NO3)2(aq) + 2AgCl(s)

Complete Ionic: Ca2+ + 2Cl- + 2Ag+ + 2NO3- → Ca2+ + 2NO3- + 2AgCl(s)

Net Ionic: Ag+ + Cl- → AgCl(s)

2. Pb2+ Ba2+ Sr2+

i) Add: NaCl(aq) Filter Out: PbCl2(s) Net Ionic equation: Pb+2 + 2Cl------> PbCl2(s)

ii) Add: NaOH(aq) Filter Out: Ba(OH)2(s) Net Ionic equation: Ba2++2OH------> BaOH)2(s)

Br- S2- PO43-

i) Add: Sr(NO3)2(aq) Filter Out: Sr3(PO4)2(s) Net Ionic equation: 3Sr2+ + 2PO43- ----> Sr3(PO4)2(s)

ii) Add: Zn(NO3)2(aq) Filter Out: ZnS(s) Net Ionic equation: Zn2+ + 2S-2 ----> ZnS(s)

iii) Add: AgNO3(aq) Filter Out: AgBr(s) Net Ionic equation: Ag+ + Br- ---->AgBr(s)

6. Calculate the Ksp for CaCl2, if 50.0 g is required to saturate 25.0 mL of water.

50.0 g x 1 mole

111.1 g = 18.0 M Ksp = 4x3 = 4(18.0)3 = 2.33 x 104

0.0250 L

Calculate the molar solubility of Mg(OH)2.

Mg(OH)2 ⇄ Mg2+ + 2OH-

x x 2x

4x3 = 5.6 x 10-12

x = 1.1 x 10-4 M