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Chemistry Forums for Students => Analytical Chemistry Forum => Topic started by: Carol_mrinn on February 27, 2022, 03:56:24 PM

Title: A determination of gravimetric iron sample
Post by: Carol_mrinn on February 27, 2022, 03:56:24 PM

Hi, needing help with something, I hope somebody help :(
Well, last week I had a laboratory and the subject was the one written on the title. The sample we used was ammonium iron (III) sulfate dodecahydrate and I need the dissociation of this salt with acid nitric, or dissociations to form ferric ion and I don't know how to do it, may someone want to help me? Please!

Title: Re: A determination of gravimetric iron sample
Post by: Orcio_87 on February 27, 2022, 04:56:29 PM

The salt breaks up into Fe³⁺, NH₄⁺ and SO₄^2- ions.

Title: Re: A determination of gravimetric iron sample
Post by: Orcio_87 on February 28, 2022, 08:13:15 AM

As of thermal decomposition you need to write the possible mechanism, like - Fe₂O₃, N₂O, H₂O and SO₂ as a products, and compare it to obtained graph (you need to coapt type of products to the graph).