Brea Roberto J, Hernández Armand, Criado Alejandro, Mosquera Jesús
Universidade da Coruña, CICA-Centro Interdisciplinar de Química e Bioloxía, Rúa as Carballeiras, 15071 A Coruña, Spain.
J Chem Educ. 2024 Jul 25;101(8):3390-3395. doi: 10.1021/acs.jchemed.4c00057. eCollection 2024 Aug 13.
Solubility is an essential concept in chemistry that describes the ability of a substance to dissolve in a particular solvent. Despite its importance in many fields of science, understanding the basic principles of solubility is challenging for many undergraduate students. Notably, students often encounter difficulties in comprehending the role of counterions when dealing with charged molecules. Here, we bring the opportunity to assimilate the key concepts of solubility regarding the role of counterions by developing a straightforward, cheap, and visually appealing experiment that focuses on the strategic use of counterions to control solubility. A student questionnaire delivered encouraging results with most of students giving positive feedback in both interest and training their hands-on skills. Hence, our experiment offers a proficient understanding of the solubility concept, thus preparing undergraduate students for advanced courses in the various subject areas of chemistry.
溶解度是化学中的一个基本概念，它描述了一种物质在特定溶剂中溶解的能力。尽管其在许多科学领域都很重要，但对许多本科生来说，理解溶解度的基本原理具有挑战性。值得注意的是，学生在处理带电分子时，常常在理解抗衡离子的作用方面遇到困难。在此，我们通过开展一个简单、廉价且视觉效果吸引人的实验，带来了一个理解抗衡离子在溶解度方面关键概念的机会，该实验着重于抗衡离子的策略性运用以控制溶解度。一份学生问卷得到了令人鼓舞的结果，大多数学生在兴趣和实践技能训练方面都给予了积极反馈。因此，我们的实验能让学生对溶解度概念有深入理解，从而为本科生学习化学各学科领域的高级课程做好准备。
