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08-08-2024
Chemistry

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A black precipitate remaining from the separation of Cr³⁺ and Fe²⁺ ions from Ni²⁺ ion is dissolved in HCl and HNO₃. Some NH₃ is added, followed by several drops of dimethylglyoxime. A colorless solution results. what do you think has happened? What might have went wrong?

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