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Double Replacement Reactions

Learn about double replacement reactions in chemistry when ionic solutions are mixed, forming precipitates that do not dissolve in water. Understand how to identify products, balance reactions, and determine net ionic equations and spectator ions.

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Double Replacement Reactions

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  1. Double Replacement Reactions When 2 ionic solutions are mixed, a double replacement reaction takes place AB + CD  AD + CB A and C are + cations B and D are - anions

  2. Based on the DRR you can identify the precipitate(s) that is formed (use the chart) • Precipitate is Insoluble • It will not dissolve in water

  3. iron III chloride (aq) + potassium hydroxide (aq) • Given these reactants what will the products be? • Balance the reaction • Identify the precipitate • Net ionic? • Spectators?

  4. iron III chloride + potassium hydroxide  iron III hydroxide + potassium chloride FeCl3 + 3 KOH  Fe(OH)3 ↓ + 3 KCl Net ionic: Fe+3 + 3 OH-1  Fe(OH)3 Spectator ions : K+1 + Cl-1

  5. magnesium nitrate (aq) + ammonium hydroxide (aq) • Products? • Balance. • Precipitate? • Net ionic? • Spectator ions?

  6. magnesium nitrate + ammonium hydroxide  magnesium hydroxide + ammonium nitrate Mg(NO3)2 + 2 NH4OH  Mg(OH)2↓ + 2 NH4NO3 Net ionic: Mg+2 + 2 OH-1  Mg(OH)2 Spectator ions: NH4+ & NO3-1

  7. Sweet 16 ChemistryION Tournament

  8. THE END

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