Pb2+
Add Cl −(aq); a white PPT forms. Add I−(aq); a yellow PPT forms
Ag+
Add Cl −(aq); a white PPT forms – dissolves if ammonia is added
Ca2+
Add SO4 2 −(aq); a white PPT forms – brick-red flame test
Cu2+
Add OH −(aq); a blue PPT forms – blue green flame test
Fe2+
Add OH −(aq); a pale green PPT forms which in time turns brown
Fe3+
Add OH −(aq); a brown PPT forms
Add Cl −(aq); a white PPT forms
Add I−(aq); a yellow PPT forms
Mg2+
Add OH−(aq); a white PPT forms, Does NOT form PPT with SO4 2 − (aq)
Ba2+