Iron(III) chromate is the
iron(III)
salt of
chromic acid with the
chemical formula Fe
2(CrO
4)
3.
Discovery
Iron(III) chromate was discovered by
Samuel Hibbert-Ware in 1817 while visiting
Shetland
Shetland, also called the Shetland Islands and formerly Zetland, is a subarctic archipelago in Scotland lying between Orkney, the Faroe Islands and Norway. It is the northernmost region of the United Kingdom.
The islands lie about to the no ...
.
Production
It may be formed by the reaction of
potassium chromate
Potassium chromate is the inorganic compound with the formula K2 CrO4. This yellow solid is the potassium salt of the chromate anion. It is a common laboratory chemical, whereas sodium chromate is important industrially.
Structure
Two crystal ...
and
iron(III) nitrate
Iron(III) nitrate, or ferric nitrate, is the name used for a series of inorganic compounds with the formula Fe(NO3)3.(H2O)n. Most common is the nonahydrate Fe(NO3)3.(H2O)9. The hydrates are all pale colored, water-soluble paramagnetic salts.
Hy ...
. This reaction forms iron(III) chromate and potassium nitrate. It also can be formed by the oxidation by air of iron and chromium oxides in a basic environment:
:4 Fe
2O
3 + 6 Cr
2O
3 + 9 O
2 → 4 Fe
2(CrO
4)
3
References
Chromates
Iron(III) compounds
Oxidizing agents
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