During the borax bead test, a specific transition metal cation forms a characteristic deep blue bead in BOTH oxidizing and reducing flames, regardless of whether the bead is hot or cold. Identify the

Question

During the borax bead test, a specific transition metal cation forms a characteristic deep blue bead in BOTH oxidizing and reducing flames, regardless of whether the bead is hot or cold. Identify the metal.

Prashant Kotian · Accepted Answer

Correct answer: B. Cobalt salts form cobalt metaborate () upon reacting with boric anhydride (). This complex exhibits a reliable, characteristic deep blue color in both oxidizing and reducing flames in both hot and cold conditions.

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