1. Aim: How to determine if an Ionic Solid Dissolves in Water
DO NOW: List properties of ionic compounds

2. Electrolytes
An electrolyte is a substance that conducts an electrical current when in an aqueous solution(dissolved in water) or a molten state.
Electrolyte: a substance that dissolves in water to produce separated, free-moving ions, giving an electrically conductive solution
All electrolytes are ionic compounds (acids, bases, and salts).

3. Electrolyte dissolved in Water
The ions in the ionic compound separate and the ionic bonds break.

4. Nonelectrolyte dissolved in Water
Molecules separate into each other, but do not separate into ions.

5. Strong Electrolytes, Weak Electrolytes, and Nonelectrolytes
Strong electrolytes are good conductors of electricity when dissolved.
Soluble in water; ions completely dissociate
Weak electrolytes are weak conductors of electricity when dissolved.
Slightly soluble in water; ions slightly dissociate
Nonelectrolytes do not conduct electricity when in an aqueous solution or in a molten state.
Most molecular compounds
Completely dissociates into ions
Slightly dissociates into ions
Does not dissociate into ions

6. Electrolytes Conduct Electricity
A solution of free-moving, separated ions can conduct electricity.

7. Electrolyte Demo
Three solutions have been prepared to test their electrical conductivity
A. Sodium chloride mixed with water
B. Lemon juice (citric acid) mixed with water
C. Chalk (calcium carbonate) mixed with water

8. Turn and Talk
Explain in terms of ions the difference between the three solutions

9. No ions. A few ions. Many ions.

10. How to determine if an ionic compound dissolves in water
Solubility Guidelines Table F
The solubility of ionic compounds in aqueous solutions is wide and varied. Some compounds are highly soluble (e.g. NaCl), some compounds are moderately soluble (e.g. SnI2) and some compounds are highly insoluble (e.g., AgCl)

11. Insoluble Ionic Compounds Dissolve to a very small degree

13. Question using Table F
Based on Reference Table F, which of these salts is the best electrolyte?
Sodium nitrate
Magnesium carbonate
Silver chloride
Barium sulfate