Optimization of Preparation Conditions and Purity Analysis of Ammonium Ferrous Sulfate

Abstract The preparation of ammonium ferrous sulfate is a typical comprehensive experiment in inorganic chemistry in universities, and is also an important part of the chemistry laboratory technology project of the National Vocational Skills Competition. The synthesis method is constantly improving. The traditional preparation experiment of ammonium ferrous sulfate was studied by reduction and green modification, and the purity of the product was analyzed by spectrophotometry. The results show that the optimal experimental conditions are as follows: the raw material of reduced iron powder with fine particle size and uniform particle size is selected, the optimum molar ratio of iron raw material to dilute sulfuric acid is 1:1.2, and the product yield and purity obtained by evaporative crystallization in water bath are higher.