A solution may contain any of all of the group 3 cations. Based on the informati

Question

A solution may contain any of all of the group 3 cations. Based on the information below, which group 3 ions are present, absent or still in doubt after each of the steps below. a. Treatment of the solution with ClO- in alkaline solution yields a yellow solution and a colored precipitate. Ions Present: Ions absent: Ions in doubt: b. The yellow solution formed in (a) is acidified and treated with NH3. No change is observed. Ions Present: Ions absent: Ions in doubt: c. The colored precipitate in part (a) dissolves in nitric acid. Addition of excess 6M NH3 to this acid solution produces only a blue solution with no precipitate. Ions present: Ions absent: Ions in doubt:

Explanation / Answer

ions present

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