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 Ionic compounds generally are a non-metal with a metal  e - spend more time around the more electronegative (polyatomic) ion  disproportional sharing.

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Presentation on theme: " Ionic compounds generally are a non-metal with a metal  e - spend more time around the more electronegative (polyatomic) ion  disproportional sharing."— Presentation transcript:

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2  Ionic compounds generally are a non-metal with a metal  e - spend more time around the more electronegative (polyatomic) ion  disproportional sharing of electrons causes a ( + ve) charged ion & ( - ve) charge ion  The ( + ve) & ( - ve) ions form a lattice (a solid structure)

3 Sodium ion Water molecule Chlorine ion

4  Q: What happens when this gets into water (a polar substance with  + and  - )?  A: The ions are pulled off by the water, with opposite charges attracting

5 Sodium ion Water molecule Chlorine ion

6  sentialchemistry/flash/molvie1.swf sentialchemistry/flash/molvie1.swf

7  NaCl (solid) + H 2 O (liquid) NaCl (aqueous)  Is there a simpler method to write this?  Use symbols

8  NaCl (s) NaCl (aq) Molecular Equation OR NaCl (s) Na + (aq) + Cl - (aq) Ionic Equation H2OH2O H2OH2O

9  What Occurs if we mix a solution of ◦ Sodium Chloride AND ◦ Silver Nitrate  What do we observe? ◦ The white substance means that a ionic solid has formed that is not dissolved in the water ◦ What is the formula of this solid?  What are the two possibilities? (NaCl) ( AgNO 3 )

10  Molecular Equation:  NaCl (aq) + AgNO 3(aq) AgCl (s) + NaNO 3(aq)  Ionic Equation:  Na + (aq) + Cl - (aq) + Ag + (aq) + NO 3 - (aq) → AgCl (s) + Na + (aq) + NO 3 - (aq) ◦ What ions exist on both sides of the equation? ◦ These can be cancelled out (Known as spectator ions)  Net Ionic Equation:  Cl - (aq) + Ag + (aq) → AgCl (s) Note: Remember your charges need to be balanced on both sides of the equation!

11  Why would this solid not dissolve in the water when the ions before were dissolved?  The force of attraction between the two ions (Ag + & Cl - ions) are stronger than the force of attraction between the ions and the polar water molecule

12  es/pptreaction4.htm es/pptreaction4.htm


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