2. A solution that may contain Sn.Bi. Cu? and Cdions is treated with thioacetamide in an...

Question:

2. A solution that may contain Sn.Bi. Cu? and Cdions is treated with thioacetamide in an acidic medium. The black precipitate that forms is partly soluble in a strongly alkaline solution. The precipitate that remains is soluble in 6M HNO, and gives a blue solution when treated with excess NH Based on this information, which ions are present, which are absent, and which are still in doubt? Present Absent Snut Cu 2+ Bi 34 3. Explain how controlling the solution pH allows separation of Group II cations from those of Group III.

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