For a solution containing at least one of the cations involved in this experiment, answer the following questions.
(1) When 6M HCL is added to the solution, a white precipitate forms. What cation(s) be present in the solution?
(2) When hot water is added to the precipitate, a white solid remains after filtration. What cation(s) may be present?
(3) When the filtrate from (2) is cooled, a white precipitate forms. What cation(s) may be present?
(4) When the precipitate in (2) after filtration is treated with aqueous NH3, the precipitate completely dissolves. What conclusions can be drawn about the presence or absence of the cation(s) in the solution?
(5) If HNO3 is added to the solution in (4), what would you expect to happen? Briefly explain.