初中化学中常见的盐中学习了氯化钠、碳酸钠、碳酸氢钠等几种盐,而碳酸钠又是一种重要的盐的代表物,由于该物质既能与酸反应产生气体,又能与某些盐(或碱)反应产生沉淀,因而在近几年的中考化学命题中备受青睐,非常活跃. Common junior high school chemistry salt to learn sodium chloride, sodium carbonate, sodium bicarbonate and other salts, and sodium carbonate is an important salt representatives, because the substance can react with acid to produce gas, and With some salt (or base) reaction precipitation, which in recent years, the school entrance examination chemistry proposition has been favored, very active.