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Physical Properties of Ionic and Covalent Compounds.

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Presentation on theme: "Physical Properties of Ionic and Covalent Compounds."— Presentation transcript:

1 Physical Properties of Ionic and Covalent Compounds

2 1.Sit in your assigned seat. DO NOT MOVE THE CHAIRS! 2.Grab a Do Now 3.ALSO, Grab 2 sheets of blank paper 4.Start the do now QUIETLY!

3 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 (H 2 O, CO 2 )

6 Solubility Ionic 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

7 Conductivity Ionic 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)

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