Precipitation Reactions

11SCI - Chemical Reactions

Finn LeSueur

2020

Ngā Whāinga Ako

  • To describe a precipitate and recall what happens in a precipitation reaction.

The video before shows us a few very important things:

  1. Ionic bonding
  2. Word formulas
  3. Symbol formulas
  4. Precipitation reaction

Precipitation Reaction

  • A precipitation reaction is where two reactants swap partners and a solid is formed.
  • You will need to use your solubility rules on your sheet to predict the solid.
  • All other products/reactants are aqueous (aq).
  • \(AB + CD \longrightarrow AC + BD\)

Doing A Precipitation Reaction

  1. Achieved: A word equation
  2. Merit: A balanced symbol equation
  3. Excellence: Predicting the precipitate (solubility rules)

Practice

Write a word equation, symbol equation and predict the precipitate for this reaction.

More Practice

This video demonstrates three more precipitation reactions. For each, write an observation that would indicate to you that a precipitation reaction is occurring, then a word and symbol equation and predict/explain the precipitate with your solubility rules.