一、实验事实1.重晶石(主要成分是BaSO_4)是制备钡化合物的重要原料,但是BaSO_4不溶于水,也不溶于酸。工业上在用重晶石制钡的化合物时,是在BaSO_4固体中加入饱和的Na_2CO_3溶液,并不断搅拌,待达到平衡后,静置,移走上层清液;再加入饱和的Na_2CO_3溶液,重复处理多次,使绝大部分的BaSO_4转化为BaCO_3;最后加入盐酸,沉淀大部分都溶解了,并有气泡产生,该气体可使澄清 First, the experimental facts 1. Barite (the main component is BaSO_4) is an important raw material for the preparation of barium compounds, but BaSO_4 is insoluble in water, do not dissolve in acid. Industrial Barium barite with barium compounds, the BaSO_4 solid solution was added saturated Na_2CO_3, and continue stirring, to be balanced, to stand, remove the supernatant; then add saturated Na_2CO_3 solution, repeat Treatment many times, so that most of BaSO_4 into BaCO_3; Finally, add hydrochloric acid, most of the precipitate is dissolved, and the bubble generation, the gas can clarify