Ways to make chromium iron oxide to sodium chromate?

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Ways to make chromium iron oxide to sodium chromate?

2007-07-09 09:29:21 · 2 answers · asked by king of jersey 1 in Science & Mathematics ➔ Chemistry

2 answers

1. Dissolve in NaOH to get sodium chromate. Filter to get rid of the iron oxide.
2. Add hydrogen peroxide to the alkaline solution - it will turn orange due to sodium chromate being formed.

2007-07-09 09:36:19 · answer #1 · answered by Gervald F 7 · 0⤊ 0⤋

It wasn't easy to find the exact procedure for how to do it, but it goes something like this (FeCr2O4=Chromite):

FeCr2O4 + 4NaOH + 2O2 ---> in a kiln (~ over 1000ÂºC) -->

+ 2H2SO4 (to neutralize any base) --> 2NaCrO4 + FeSO4 + Na2SO4 + 4H2O

ref: http://mcilvainecompany.com/generic_examples/air/chemicals.htm

2007-07-09 16:55:17 · answer #2 · answered by Dr Dave P 7 · 0⤊ 0⤋