The handling of chemicals in the laboratory presents a challenge in instructing large class sizes and when students are relatively new to the laboratory environment. In this work, we describe and demonstrate an augmented reality colorimetric titration tool that operates out of the smartphone or tablet of students. It allows multiple students to conduct the exercise at the same time, respond quickly to actions made, and correctly depict the colors associated with changes in pH values for the indicator used. The tool imbues unparalleled realism in the conduct of the experiment and offers to strongly help students acquire bench skills with minimal use of liquid chemicals, thereby reducing handing risks for them and resulting in lower negative impacts on the environment. The feedback received from undergraduate students that participated in an initial small test exercise with the tool corroborates this.

中文翻译：

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开发和演示增强现实比色滴定工具

在指导大班授课和学生相对不熟悉实验室环境时，实验室中化学品的处理提出了挑战。在这项工作中，我们描述并演示了可在学生的智能手机或平板电脑之外运行的增强现实比色滴定工具。它使多个学生可以同时进行练习，对动作做出快速反应，并正确描绘与所用指示剂的pH值变化相关的颜色。该工具在实验过程中体现了无与伦比的真实感，可以在不使用液态化学物质的情况下，极大地帮助学生掌握实验技能，从而降低了对他们的处理风险，并减少了对环境的负面影响。