运用手持技术数字化实验探究缓冲溶液的配制和性质

Study on Preparation and Properties of Buffer Solution by Digital Experiment of Handheld Technology

针对本校基础化学课程中缓冲溶液的实验内容过于简单、对比不明显等问题,为了让临床医学本科专业的学生更好地理解缓冲溶液的性质,改进了缓冲溶液实验,尝试引入手持技术数字化实验设备中的pH传感器和滴数传感器改进缓冲溶液的配制和性质实验,对比不同缓冲比和不同缓冲总浓度下缓冲溶液的抗酸抗碱抗稀释能力,绘制相应的pH-V曲线,以利于加深学生对缓冲溶液性质和作用的理解。

In view of the problems that the experimental content of buffer solution in the basic chemistry course of our school is too simple and the comparison is not obvious,in order to make the students of clinical medicine majors better understand the properties of buffer solution,the author improves the buffer solution experiment,and tries to introduce the pH sensor and the drop sensor in the digital experimental equipment of handheld technology to improve the preparation and properties of buffer solution.The ability of acid resistance,alkali resistance and dilution resistance of buffer solution under different buffer ratios and different buffer total concentrations is compared,and the corresponding pH-V curve is drawn,which is helpful to deepen students'understanding of the nature and function of buffer solution.