大学化学 >> 2020, Vol. 35 >> Issue (4): 43-49.doi: 10.3866/PKU.DXHX201911057

所属专题: 全国大学生化学实验创新设计竞赛

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云蒸霞蔚——多色双喷泉实验

张阿芳, 敖渝涓, 钱鸣来, 王媛媛, 陈波(), 陈启明()   

  • 收稿日期:2019-11-26 录用日期:2019-12-17 发布日期:2020-03-04
  • 通讯作者: 陈波,陈启明 E-mail:bchen@chem.ecnu.edu.cn;qmchen@chem.ecnu.edu.cn

Multi-color Double Fountains

Zhang Afang, Ao Yujuan, Qian Minglai, Wang Yuanyuan, Chen Bo(), Chen Qiming()   

  • Received:2019-11-26 Accepted:2019-12-17 Published:2020-03-04
  • Contact: Chen Bo,Chen Qiming E-mail:bchen@chem.ecnu.edu.cn;qmchen@chem.ecnu.edu.cn

摘要:

本实验在氨气和氯化氢气体的单喷泉实验基础上设计了集两种气体的制备、收集、验满、尾气处理、气体反应、喷泉实验与试剂回收利用于一体的连续性实验,喷泉部分涉及到的实验原理有氨气与硫酸铜溶液的配位反应、氨气与氯化钴溶液的沉淀反应、无色酚酞溶液和酸性对硝基苯酚溶液在碱性环境下的变色反应,以及氯化铁和硫氰化钾在弱酸性条件下的反应等。本实验的主要仪器装置由团队自行设计、定制,操作简便,玻璃活塞还可控制喷发顺序,实现多色多样喷泉,伴随氯化铵生成时的袅袅白烟,云蒸霞蔚,煞是壮观。另外,我们设计了多角度的互动方案,针对不同程度知识背景的受众传授知识,让参观者真切感受到化学的魅力。

关键词: 双喷泉实验, 氨气, 氯化氢, 新创装置, 多色

Abstract:

Based on the existing single fountain experiment of ammonia and hydrogen chloride, this experiment designed a continuous operation to integrate the preparation, collection, inspection, exhaust gas treatment, gas reaction, fountain experiment and reagent reuse of the two gases. The experimental principle of the fountain colors includes the coordination reaction of ammonia molecule with copper ion, the precipitation reaction of ammonia water and cobalt chloride solution, the color change reaction of leucophenolic phenolic solution, and acidic reaction of ferric chloride and potassium thiocyanate under acidic conditions. The main apparatus of this experiment was designed and customized by the team, and the operation of the experiment is very simple. The use of glass pistons can control the order of the fountains, thus achieving fountains of various colors. At the same time, with the formation of ammonium chloride, white smoke will be produced, and the colorful fountains are as inlaid in the white clouds, which is spectacular. In addition, we have designed a multi-angle interactive communication program that can transfer multiple levels of knowledge to different audiences, open their minds, and let visitors truly feel the charm of chemistry.

Key words: Double fountains experiment, Ammonia gas, Hydrogen chloride, Innovative device, Multi-color

MSC2000: 

  • G64