高中化学(试用本)第二册第186页的演示实验和第262页的学生实验,均采用饱和碳酸钠溶液接收馏出的乙酸乙酯。这对制备、分离是有利的。在中学阶段只要求看到透明油状液体浮在液面上,并闻到果香味。为此,可直接用冷水收集馏出物。这样收集的馏出物呈酸性,可抑制酯的水解,有利于配合课文的讲授。 The demonstration experiment on page 186 of the high school chemistry (trial paper) and the student experiment on page 262 all use saturated sodium carbonate solution to receive distilled ethyl acetate. This is advantageous for preparation and separation. At the middle school stage, only transparent oily liquids were required to float on the surface and smell the fruit. For this purpose, the distillate can be collected directly with cold water. The distillate collected in this way is acidic and can inhibit the hydrolysis of the ester, which is beneficial to the teaching of the text.