The majority of ionic solids are soluble in aqueous solution. However, sometimes when two soluble solutions are mixed an insoluble compound is formed. In this lab, students will observe precipitation reactions, use solubility table to predict the insoluble reactant,  and write the balanced equation for the reaction.

Timing: One Class Period

Prior Knowledge: Familiar with using a solubility chart, balancing chemical equations, naming & writing formulas for compounds.
Materials: (per lab group) 

  • testing solutions in dropping bottles, or in 50 mL beakers with disposable pipets
  • 10-well or more well plates (can substitute 25 mL beakers, test tubes, transparency pages, or sheet protector)
  • tooth picks or stirring rods
  • solubility chart


Students will master using the solubility chart to determine the precipitate product.


  1.  Be sure to read the teacher notes linked below for information on the set up and running the lab.
  2.  Students will preform 16 reactions, determine which reactions occur, producing a precipitate.
  3.  In this lab, students are not given the chemical formulas for the compounds used in the lab.
  4.  After mixing the solutions, and observing the results, students will write a balanced chemical equation, a balanced complete ionic equation, and a balanced net ionic equation for each reaction that produced a precipitate. 

This activity is included in our Chemical Bonding Unit:

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