1. Physical Properties of Ionic and Covalent Compounds

2. Sit in your assigned seat. DO NOT MOVE THE CHAIRS!
Grab a Do Now
ALSO, Grab 2 sheets of blank paper
Start the do now QUIETLY!

3. (leave room for notes here)
Physical Properties
(leave room for notes here)
Ionic Compounds Covalent Compounds
Melting and Boiling Point
Solubility
Conductivity

4. Physical Properties
Physical properties of substances are affected by the attractive forces between particles
– Greater attraction between the molecules→ more energy is required to overcome the attractive forces between molecules
Intermolecular forces in covalent compounds are weaker than interionic forces

5. Melting and Boiling Point
Ionic
Covalent
High melting and boiling point
Ionic compounds are solids at room temperature
Lower Melting Points than ionic compounds
Intermolecular Forces aren’t as strong as interionic forces
Covalent compounds are liquids or gases at room temperature (H2O, CO2)
Melting and Boiling Point

6. Ionic Solubility Covalent Many are soluble in water
Ions separate when dissolved in water
NaCl will dissolve in water and become freely moving Na+ and Cl- ions
Will dissolve in liquids with similar molecular polarity
“Like dissolves like”
Polar dissolves in polar
Non-polar dissolves in non-polar
Polar and non-polar will not mix
Oil and water do not mix because water is polar and oil is non-polar
Solubility

7. Ionic Conductivity Covalent
Ionic compounds dissolved in liquids are good conductors because the ions are separated. The ions need to be able to move freely in order to conduct electricity
Solid ionic compounds are poor conductors because the ions are not separated and will not move
Cannot conduct electricity as solid, liquid, or when dissolved
Molecules will not separate into ions (electric current need charge carriers)
Conductivity