A solution sample may only contain Ag^+, Pb^2+, and Hg^2+ 2 ions. After the addition of 6 M HCl, a white precipitate forms. After centrifugation, the tube of solid was added to a beaker of boiling water. The tube was centrifuged. Acetic Acid and potassium chromate was added to the liquid that was separated from the solid residue and a bright yellow precipitate formed. The remaining solid residue dissolved when 6 M NH3 was added but no precipitate was formed. The solution was then acidified with 6M HCl and a white precipitate formed. Based on this info, justify your answers to these questions.

Pb is present, and Ag

1. Which of the 3 possible ions are present in the solution sample?

is it Hg is missing

2. Which of the 3 possible ions are absent in the solution sample?