6.Ionic_Compounds at a glance for high s
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Ionic compounds are formed from a reaction between a metallic and non-metallic element where electrons are transferred. They have properties such as being hard, brittle solids with high melting points due to their ionic bonding. When dissolved or molten, ionic compounds can conduct electricity as the ions are able to move freely. Sports drinks contain electrolytes to replace what is lost through sweat during exercise which helps conduct electrical signals in the body.
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SWOT analysis in the project Keeping the Memory @live.pptx
6.Ionic_Compounds at a glance for high s
- 2. What do you remember about ionic and molecular compounds?
- 3. Properties of Ionic Compounds: • Metallic element + non-metallic element • Hard and brittle • High melting pt and boiling pt – E.g. NaCl melts at 801⁰C • Conduct electricity as molten liquids • Conduct electricity when dissolved
- 4. Battery Light Bulb Salt Water Metal Questions: 1. Can pure water conduct electricity in the same way? 2. Sodium chloride is an electrolyte in water because it conducts electricity. Why would sports drinks contain electrolytes?
- 5. Formation of Ionic Compounds: • Electrons are transferred from metallic element to non-metallic element • Creates + ion and – ion • bond between + ion and – ion creates ionic bond
- 7. Examples: 1. Show how a lithium ions forms 2. Show how a fluorine ion forms 3. Show how a lithium and fluorine ion form an ionic compound
- 8. 4. Show how beryllium and chlorine form a compound and write the chemical formula. 5. Show how calcium and phosphorous form a compound and write the chemical formula.
- 9. Right Now! Practice: pg. 58 #1
- 10. Structure of Ionic Compounds: • Sodium chloride forms a crystal lattice structure – Rigid arrangement – Cube shaped
- 11. • Not all ionic crystals are cubes – E.g. Cinnabar (mercurcy (II) sulfide) • Does not have right angles
- 12. • Note that a formula unit represents one molecule (e.g. NaCl) • An ionic compound is made up of many positive and negative ions in a fixed ratios Formula Unit Ionic Compound
- 13. Understanding of Ionic Compounds: High Melting Point due to strong electrostatic forces (ionic bonds) Hardness bonds resist being scratched Electrolytes water molecules surround each ion and separate it from crystal, ions in solutions can carry charge
- 14. Homework: Read 2.1 and pg. 60 #1-8