Add about 20 drops of dilute hydrochloric acid (HCl) solution to about 10
drops of 0.5 M lead (II) nitrate, Pb(NO3)2 solution
in a test tube and mix. Record your observations.
Centrifuge and separate the precipitate from the solution. Discard the solution.
Add about 2 mL of distilled water and stir to wash the precipitate. Centrifuge
and separate the precipitate from the solution. Discard the solution.
Add about the 3 mL of distilled water to precipitate and place the tube
in a beaker of boiling water. Heat the mixture for about 2 minutes and stir
occasionally. All the precipitate may not dissolve. Add more distilled water
if necessary. Record your observations.
Remove the tube from the beaker and add a few drops of 0.5 M potassium chromate,
yellow precipitate of lead (II) chromate, PbCrO4, confirms
the presence of Pb2+ ions. Record your observations.