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 I know it isn't B, as copper ion solution is not colorless. I can somewhat rule out A, as silver chloride is incredibly insoluble relative to the other options. I'm a bit lost after this however. Possible answers remain A, C, and D. Thanks in advance.