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What is ferrous ammonium sulfate?

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Ferrous ammonium sulfate, also known as ammonium iron(II) sulfate or Mohr's salt, is a chemical compound with the molecular structure (NH4)2Fe(SO4)2. It also exists as a hexahydrate. Its simplified molecular formula is (NH4)2Fe(SO4)2, and its molecular weight is 284.05 for the anhydrous form and 392.14 for the hexahydrate.

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Full Answer

Ammonium iron(II) sulfate is obtained from iron, ammonia and sulfuric acid, while the hexahydrate is produced by a reaction between ammonium sulfate and ferrous sulfate. Commonly, a very pure form of Mohr's salt is used during the process of titration. It is also used in Fricke's dosemeter in order to measure large doses of gamma rays.

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