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Chemistry

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A solution may conain the ions Ba^2+, Ag^+, and Cu2+. Add sodium chloride and get a white predipitate. The supernatant is decanted, potassium sulfate solution is added to the supernatant and no reaction is observed. Add sodium hydroxide and get a blue solid. Which ions are present?

I think Ag^+ and Cu^2+

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    correct.

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