Aqueous solutions have proved to be a challenging topic for chemistry students at all levels. An understanding of what is happening at the molecular level in aqueous processes such as dissolution is key to understanding the macroscopic properties of the system as well as to communicating fluently with chemical symbols. In this study, we examined the storyboards of 28 high school students in the United States who participated in a series of lessons employing the VisChem Approach that addressed the topics of liquid water, solid sodium chloride, and finally sodium chloride dissolution in water over the course of a year. Results of the study indicate that the VisChem Approach is effective in helping students gain knowledge about aqueous systems. Using the results of this study, we developed a teaching guide for scaffolding learning about the three topics, including detailed knowledge targets and recommended teaching moves for each of the three lessons.

中文翻译：

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使用 VisChem 方法生成支架氯化钠溶解的循证指南

事实证明，水溶液对于各个级别的化学学生来说都是一个具有挑战性的话题。了解溶解等水相过程中分子水平上发生的情况是理解系统宏观特性以及与化学符号流畅交流的关键。在这项研究中，我们检查了 28 名美国高中生的故事板，他们参加了一系列采用 VisChem 方法的课程，这些课程涉及液态水、固态氯化钠以及最终氯化钠在水中的溶解等主题一年的。研究结果表明 VisChem 方法可以有效帮助学生获得有关水系统的知识。利用这项研究的结果，我们制定了关于这三个主题的支架式学习教学指南，包括三节课中每节课的详细知识目标和推荐的教学动作。