大学化学 >> 2021, Vol. 36 >> Issue (6): 2006084.doi: 10.3866/PKU.DXHX202006084

未来化学家 上一篇    下一篇

“铬”显神通——过氧化氢环境下三价铬的变化探究

吴嘉璇, 温瀚韬, 吴锶敏, 梁泳彤, 铁绍龙(), 李玥()   

  • 收稿日期:2020-06-29 录用日期:2020-07-20 发布日期:2020-09-28
  • 通讯作者: 铁绍龙,李玥 E-mail:tiesl@scnu.edu.cn;yueli@m.scnu.edu.cn
  • 作者简介:Emails: yueli@m.scnu.edu.cn (李玥)
    Emails: tiesl@scnu.edu.cn (铁绍龙)
    第一联系人：

    †共同第一作者(本科2018级)

  • 基金资助:
    广东省自然科学基金(2016A030308010);广东省自然科学基金(2016A030308019);广东省自然科学基金(2018A030313854);国家重点研发计划(2016YFA0201002);华南师范大学青年教师科研培育基金(17KJ05)

The Amazing Color of Chromium: Reaction of Cr(Ⅲ) with Hydrogen Peroxide

Jiaxuan Wu, Hantao Wen, Simin Wu, Yongtong Liang, Shaolong Tie(), Yue Li()   

  • Received:2020-06-29 Accepted:2020-07-20 Published:2020-09-28
  • Contact: Shaolong Tie,Yue Li E-mail:tiesl@scnu.edu.cn;yueli@m.scnu.edu.cn

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摘要：

铬元素及其化合物拥有丰富的颜色，化学性质多变，大学无机化学中对铬及其化合物的性质多有考查。本文主要探讨了Cr（III）在过氧化氢环境下的变化。观察到反应液酸碱度、反应物浓度及反应温度等条件不同，反应历程不同，主要表现为溶液颜色变化。Cr（III）与过氧化氢反应复杂，颜色多变，非常有趣，有助于学生直观地学习和理解铬元素不同价态的变化。另外，介绍了与其相关的实际应用与趣味实验，以供参考。

关键词: 三价铬, 过氧化氢, 趣味实验

Abstract:

Chromium and its compounds possess very diverse color and exhibit useful physical and chemical properties, which is introduced in inorganic chemistry. In this paper, the reaction between chromium (Ⅲ) and hydrogen peroxide is mainly discussed. With the change of pH, reactant concentration and temperature, the reaction mechanism will be different, which is mainly shown by the color alteration of the solution. The reaction between chromium (Ⅲ) and hydrogen peroxide is very interesting, because of its complex mechanism and rich colors, which could help students learn and understand the change of different valence states of chromium. In addition, the related practical application and interesting experiments are introduced.

Key words: Trivalent chromium, Hydrogen peroxide, Fun experiments