Add the solution in the dropper to the solutions in the test tubes. Use the results to identify the mystery solution.

Learning objectives

This lab will help you develop and use general rules regarding solubility through investigations with aqueous solutions.

Real world application

Being able to predict whether mixing two solutions will form a precipitate is a valuable skill in chemical industries. Precipitation reactions can be used to form desired solid compounds or avoided to prevent solids that might clog equipment or be dangerous from forming. Knowledge of the solubility of substances could also be used to determine the identity of an unknown solution.

  • K2CO3
  • KI
  • KOH
  • K2SO4
  • K2S
  • ?
  • K2CO3
  • KI
  • KOH
  • K2SO4
  • K2S
  • ?
  • K2CO3
  • KI
  • KOH
  • K2SO4
  • K2S
  • ?