碳酸锰制备实验的改进

Improvement on experiment of preparation of manganese carbonate

对碳酸锰制备实验进行改进,避免传统的利用二氧化锰和草酸反应制备,而是采用软锰矿为原料,用七水合硫酸亚铁作为还原剂去制备,在不增加实验步骤的同时,引入了铁杂质,这就要求学生学习并掌握碳酸锰制备过程中除铁的方法,通过此方法,学生不仅了解氧化还原反应、沉淀反应及酸碱反应在无机制备中的应用,还掌握了过滤、沉淀等基本实验的操作,不仅丰富了实验内容,还能更好地培养学生的实践能力。

The preparation of manganese carbonate experiment was improved, avoid the traditional use of manganese dioxide and oxalic acid. Manganese carbonate was prepared by soft manganese ore as raw material, with seven hydrated ferrous sulfate as reductant. Without any increase of experimental steps,the iron impurities were brought into the system, which required the students to learn and master the methods of iron removal during the preparation of manganese carbonate. Through this method, students can also understand the application of oxidation-reduction reaction, precipitation reaction and acid basereaction in inorganic preparation, and master the operation of basic experiments such as filtration and precipitation. Not only enrich the experimental content, also can better develop the students＇ practical ability.