posted by viv .
suppose you had a sample of water and you knew that either the silver ion or the barium ion were in the water . What negative ion could you add to this water sample that would precipitate out one of the ions but not the other?state which ion would form the precipitate and write its chemical formula?
Add Cl^-. AgCl is insoluble but BaCl2 is quite soluble.
Ag^+(aq) + Cl^-(aq) ==> AgCl(s)