Suppose a solution contained only 1 cation: Cr3+, Fe3+ or Cu2+.What would u do to identify the cation quickly?

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Suppose a solution contained only 1 cation: Cr3+, Fe3+ or Cu2+.What would u do to identify the cation quickly?

2007-04-17 15:03:53 · 3 answers · asked by Curious Sarah 2 in Science & Mathematics ➔ Chemistry

3 answers

I would look at it. If it's purple, it's Cr3+. If it's orange, it's Fe3+. If its blue-to-green, it's Cu2+.

2007-04-17 15:09:10 · answer #1 · answered by steve_geo1 7 · 0⤊ 0⤋

Put it in aqueous Solution ( dissolved in Water) and what the color is. Depending on what color it is.. u can determine the Cation.

Cr3+ = Violet
Fe3+ = Gold or Yellow
Cu2+ = Blue

2007-04-17 15:08:25 · answer #2 · answered by John Smith 2 · 0⤊ 0⤋

Add a few drops to starch. Turns black if Fe. Place a few drops on a piece of paper towl. Allow to dry or dry with hair dryer. Carefully burn the paper. Green flame is Cu. Cr by elinination af 1 and 2.

2007-04-17 15:13:48 · answer #3 · answered by bill a 2 · 0⤊ 0⤋