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高中化学学习乙醇氧化性时,教材叙述了“乙醇在加热和有催化剂(Cu或Ag)存在的条件下,能被空气氧化,生成乙醛”。工业上根据这原理,用乙醇制造乙醛。为了加强直观,使学生获得上述感性认识,设计了本演示实验,不仅使学生学习了乙醛的制法,而且进一步巩固了乙醇的重要化学性质。 装置: 如图所示。取一根有支管的玻璃管,下端配附有钩形导管的单孔塞,用橡皮管将钩形管连接到T形管上,T形管的其它两端分
When high school chemistry learns about ethanol oxidation, the textbook states that “Ethanol can be oxidized by air to produce acetaldehyde under the conditions of heating and catalyst (Cu or Ag).” According to this principle industrially, acetaldehyde is produced from ethanol. In order to enhance the visual acuity and enable the students to obtain the above perceptual knowledge, this demonstration experiment was designed to not only enable students to learn the method of producing acetaldehyde, but also to further consolidate the important chemical properties of ethanol. Device: As shown in the figure. Take a glass tube with a branch tube, a single hole plug with a hooked catheter at the lower end, and use a rubber tube to connect the hook tube to the T tube. The other ends of the T tube are divided.