Producing Chromium (Cr)
Cr: Chromium
Vauquelin (France) discovered and separated in 1780.
Abundance: 122ppm(in the earth's crust)
TrekGEO > Mineral Trail > Producing elements from minerals > Chromium
Bake chromite with sodium carbonate in the air.
2FeCr2O4 + 4Na2CO3 
4Na2CrO4 + Fe2O3 + 4CO2 
Add sulfuric acid to sodium chromate extracted by water.
Na2Cr2O4 + H2SO4 CrO3 + Na2SO4
Recover red crystals.
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