1. Properties of Solutions and Solubility
Chemistry, The Central Science, 10th edition
Theodore L. Brown; H. Eugene LeMay, Jr.; and Bruce E. Bursten
Properties of Solutions and Solubility
John D. Bookstaver
St. Charles Community College
St. Peters, MO
 2006, Prentice Hall, Inc. 1

2. Solutions: Homogeneous mixtures of two or more pure substances.
The solvent is present in greatest abundance.
All other substances are solutes. 2

3. Solutions
Solutions are homogeneous mixtures of two or more pure substances.
In a solution, the solute is dispersed uniformly throughout the solvent. 3

4. Dissociation
When an ionic substance dissolves in water (most common solvent), the solvent pulls the individual ions from the crystal and solvates them.
This process is called dissociation. 4

5. Electrolytes
Substances that dissociate into ions when dissolved in water.
A nonelectrolyte may dissolve in water, but it does not dissociate into ions when it does so. 5

6. Electrolytes and Nonelectrolytes
Soluble ionic compounds tend to be electrolytes. 6

7. Electrolytes and Nonelectrolytes
Molecular compounds tend to be nonelectrolytes, except for acids and bases. 7

8. Electrolytes
A strong electrolyte dissociates completely when dissolved in water.
A weak electrolyte only dissociates partially when dissolved in water. 8

9. Strong Electrolytes Are…
Strong acids 9

10. Strong Electrolytes Are…
Strong acids
Strong bases 10

11. Strong Electrolytes Are…
Strong acids
Strong bases
Soluble ionic salts 11

12. Always soluble…
All alkali metals (Sodium, potassium, etc.), ammonium, acetate, and nitrate salts
Examples:
NaCl
KCl
NH4Cl
KNO3
6.C.3d