1. The problem statement, all variables and given/known data A colorless solution is known to contain one of these ions. Which ion is present if adding dilute HCl produces a white precipitate that dissolves when the solution is warmed? A) Ag+ B) Cu2+ C) Hg22+ D) Pb2+ 2. Relevant equations N/A 3. The attempt at a solution The only one I could really rule out was copper chloride, as it is soluble. I'm stuck because I know that AgCl, Hg2Cl2, and PbCl2 are all white precipitates. Without using a chart, how can I determine qualitatively which dissolves in a warmed solution? Thank you in advance.