3. Aqueous Lead(II) Nitrate in
Qualitative Analysis
Lead(II) nitrate is used to precipitate
insoluble lead(II) salts in the identification of anions.
Chloride, sulphate and carbonate ions combine with lead(II)
ions to form white precipitates while iodide ions combine
with lead(II) ions to form a yellow precipitate.
Experiment
3:
To
identify aqueous solutions containing chloride ions
and iodide ions using lead(II) nitrate solution.
Cl-
(aq) ion
I-
(aq) ion
Place 2 cm3 of each sample
solution in a test tube. Add an equal volume of
dilute nitric acid followed by a few drops of
lead(II) nitrate.
