Metal finishing Q&As since 1989
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Reaction between HNO3 and ferrous sulphate
August 1, 2008
hellow
I have a question about the reaction of HNO3 and ferrous sulphate ferrous sulphate
[affil links]. what is the reaction. we have a green sample of acid in our plant what do you think about the colour.
thanks for your attention
- Mohshahr, Iran
My handbook only lists three iron compounds as being green and they are salts that include ammonia
[on
eBay or
Amazon] or cyanide or fluoride.
Sounds like you have some copper in the solution.
- Navarre, Florida
August 1, 2008
When you mix a little FeSO4 in HNO3 you get a nice light lime green color. 5% FeSO4 w/v gives this amount, more will turn brown and ferric ammonium sulphate will turn purplish.
Jason RothmanChemist - Pomona, California, USA
August 6, 2008
August 7, 2008
Hi Jason,
Do you have a guess as to what that compound might be that causes the lime green color?
Jim, another chemist (retired)
- Navarre, Florida
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