CHM 2046C Module 12 Chapter 18 Name: _ Sample Exam__

Part G: Writing K_sp Expressions 10 points

Write the dissociation reactions for the following insoluble salts, then setup the K_sp expressions:

1. Cu(OH)₂ (s) + HOH (l) ß à

K_sp = K_sp = 2.2 x 10 ^-20

2. MgCO₃ (s) + HOH (l) ß à

K_sp = K_sp = 6.8 x 10 ^-6

3. Al₂(PO4)₃ (s) + HOH (l) ß à

K_sp = K_sp = 9.8 x 10 ^-21

4. Cu₂S (s) + HOH (l) ß à

K_sp = K_sp = 2.2 x 10 ^-48

5. Mg(OH)₂ (s) + HOH (l) ß à

K_sp = K_sp = 5.6 x 10 ^-12