Presentation on theme: "Physical Properties of Ionic and Covalent Compounds"— Presentation transcript:
1 Physical Properties of Ionic and Covalent Compounds
2 Sit in your assigned seat. DO NOT MOVE THE CHAIRS! Grab a Do NowALSO, Grab 2 sheets of blank paperStart the do now QUIETLY!
3 (leave room for notes here) Physical Properties(leave room for notes here)Ionic Compounds Covalent CompoundsMelting and Boiling PointSolubilityConductivity
4 Physical PropertiesPhysical 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 moleculesIntermolecular forces in covalent compounds are weaker than interionic forces
5 Melting and Boiling Point IonicCovalentHigh melting and boiling pointIonic compounds are solids at room temperatureLower Melting Points than ionic compoundsIntermolecular Forces aren’t as strong as interionic forcesCovalent 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 waterNaCl will dissolve in water and become freely moving Na+ and Cl- ionsWill dissolve in liquids with similar molecular polarity“Like dissolves like”Polar dissolves in polarNon-polar dissolves in non-polarPolar and non-polar will not mixOil and water do not mix because water is polar and oil is non-polarSolubility
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 electricitySolid ionic compounds are poor conductors because the ions are not separated and will not moveCannot conduct electricity as solid, liquid, or when dissolvedMolecules will not separate into ions (electric current need charge carriers)Conductivity
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