碳酸钠是生活中常见的物质,也是一种重要的化工原料,学生在初中阶段对这种盐已有初步的认识。在此基础上,苏教版高中《化学1》专题二第二单元第二课时“碳酸钠的性质与应用”对碳酸钠的性质进行更全面的实验探究,并且引出一种“新”的物质——碳酸氢钠。教材中有一个实验:“[实验2]按图2-9所示组装仪器,将滴管中的浓盐酸加入(装有碳酸钠溶液的广口)瓶中, Sodium carbonate is a common substance in life, but also an important chemical raw materials, students have a preliminary understanding of this salt in the junior high school. On this basis, a more comprehensive experimental study on the nature of sodium carbonate was conducted in the second lesson of ”Chemistry 1“ ”Material - sodium bicarbonate. There is an experiment in the textbook: "[Experiment 2] Assemble the instrument as shown in Figure 2-9, add concentrated hydrochloric acid in the eyedropper (wide mouth with sodium carbonate solution)