If you are told that one of them is Cr2O3 and the other is OsO4, which one do you expect to be the yellow solid?

2 answers:

7 0

From own experience, I know that OsO4 is colorless, but Cr2O3 is actually a solid green from what I have seen. but I guess it could appear yellow-greenish.

luda_lava [24]3 years ago

4 0

Answer is: OsO₄ (osmium tetroxide or osmium(VIII) oxide).

Osmium(VIII) is colourless, but most samples appear yellow, because of the presence of the impurity OsO₂ (osmium(IV) oxide), which is yellow-brown in colour.

Cr₂O₃ (chromium(III) oxide) is light to dark green compound. It is used as a pigment. In this chemical compound chromium has oxidation number +3.

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