I am preparing a solution of Mohr's Salt with ammonia solution. In literature the color of this solution is green but I am getting a brown color sol?

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John Duchek

I would think the easiest way would be to prepare it under an inert gas such as nitrogen. Perhaps prepare an initial solution at neutrality, bubble N2 through for a few minutes to de gas the solution. Provide a N2 cover and then add your excess ammonia.

Michael Zilberbrand

Sulfuric acid can be added to solutions of Mohr’s salt in order to prevent the oxidation of the ferrous ion to the ferric ion.

Muhammd Ajmal

Michael Zilberbrand I have to perform the reaction at 13 pH and maintain it, the addition of sulphuric acid will have no effect.

John Duchek Thank you.