Problem: Three cations, Ni2+, Cu2+, and Ag+, are separated using two different precipitating agents.Using these agents, indicate which of the cations is A, which is B, and which is C.

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We are asked to indicate which of the three cations Ni2+, Cu2+, and Ag+, is Cations A, B, and C from the diagram.


We will use the Cation Separation Flow Chart to separate the three cations.

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Problem Details

Three cations, Ni2+, Cu2+, and Ag+, are separated using two different precipitating agents.1. Mixture of cations A, B, and C in test tube. 2. Add first precipitating agent.  Cation A is removed as precipitate, B and C remain in solution 3. Decant liquid.  Only cations B and C remain. 4. Add second precipitating agent.  Cation B is removed as precipitate, cation C remains in solution. 5. Decant liquid.  Only cation C remains.

Using these agents, indicate which of the cations is A, which is B, and which is C.