摘要
为了说明含氟牙膏刷牙预防龋齿背后的化学原理,用鸡蛋壳代替牙齿设计了数字化实验.利用电导率传感器研究鸡蛋壳存在沉淀溶解平衡,利用压强传感器研究含氟牙膏水泡过的鸡蛋壳具有抗酸性,利用Logger Pro的线性拟合功能得到鸡蛋壳与盐酸反应的速率曲线,说明F-的保护时间有限.并从理论上分析了上述现象产生的原因.
In order to illustrate the chemical principles behind the fluoride toothpaste which could prevent dental caries, this paper designed digital experiment by using egg shells instead of teeth. This paper used conductivity sensor to study the dissolution equilibrium of egg shells, and applied gas pressure senor to study whether the egg shells blistered by the fluoride toothpaste had the ability of resisting acid or not. Moreover, this paper used the linear fitting function of Logger Pro to get the reaction rate curve of egg shell and hydrochloric acid, and indicated the limited protection time of fluoride ion. Finally, the cause of the phenomenon was also analyzed theoretically.
出处
《化学教育》
CAS
北大核心
2016年第21期55-58,共4页
Chinese Journal of Chemical Education
关键词
含氟牙膏
预防龋齿
化学原理
沉淀溶解平衡
数字化实验
toothpaste with fluoride
prevention of dental caries
chemical principle
precipitation dissolution equilibrium
digital experiment
