A portion of the unknown metal was digested using hot, concentrated nitric acid

Question

A portion of the unknown metal was digested using hot, concentrated nitric acid and dried to yield the metal nitrate salt. A 0.10M solution of this salt and tested using six 0.2M chemical spot test reagents: potassium chromate, sodium chloride, sodium hydroxide, sodium sulfide, ammonium hydroxide, and sodium phosphate. Reaction with chromate and hydroxide yielded orange precipitates. Reaction with sulfide and ammonium hydroxide yielded brown precipitates. Reaction with phosphate yielded a yellow precipitate. No visible reaction was observed with chloride.

Identity of unknown metal: ________________________

Narrative Explanation:

Explanation / Answer

Absolutely, the metal should a divalent metal.

Explanation: 0.1 M solution of metal nitrate salt requires 0.2 M solution of other reagents.

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