CHM 2046C
Sample Module 12 Name: __Answers_____
H. Comparing Solubility of Salts 10 points
An insoluble substance is defined as one
that has solubility less than 0.01 moles/liter of water.
Using Ksp
values, tell which salt in each pair is more soluble in water:
1. AgCl (Ksp =
1.8 x 10-10) or AgCN (Ksp
= 6.0 x 10-17)
Answer:
2. Mg(OH)2 (Ksp = 5.6
x 10-12) or Ca(OH)2 (Ksp
= 5.5 x 10-5)
Answer:
3. MgCO3 (Ksp = 6.8
x 10-6) or CaCO3 (Ksp = 3.4 x 10-9)
Answer:
4. FeCO3 (Ksp = 3.1
x 10-11) or Ag2C2O4 (Ksp
= 5.4 x 10-12)
Answer:
Which compound in each pair is more soluble in water than is
predicted by a calculation from Ksp :
5. AgBr (Ksp
= 5.4 x 10-13) or AgCN (Ksp = 6.0 x 10-17)
Answer:
6. PbCl2 (Ksp
= 1.7 x 10-5) or PbCO3 (Ksp
= 7.4 x 10-14)
Answer:
7. PbCl2 (Ksp
= 1.7 x 10-5) or PbF2 (Ksp
= 3.3 x 10-8)
Answer:
Which insoluble
compound in each pair should be more soluble in nitric acid than in pure water:
8. PbCl2 (Ksp
= 1.7 x 10-5) or PbS (Ksp = 9.0 x 10-24)
Answer:
9. AgCl (Ksp =
1.8 x 10-10) or Al(OH)3 (Ksp = not known)
Answer: A
10. AgI (Ksp
= 8.5 x 10-17) or Ag2CO3 (Ksp
= 8.5 x 10-12)
Answer: