In this paper,an innovative improvement was made to resolve the problems of titration endpoint determination for the determination of solubility product constant of lead iodide based on the ion exchange method.An electronic pH meter was used to replace the traditional thymol blue bromide indicator.Comparative experimental studies show that the improved experimental calculations are more accurate with higher efficiency and stability,which is conducive to stimulating the scientific innovation spirit of students,cultivating students'hands-on ability for independent scientific research,and is more suitable for long-term teaching as a typical experiment of undergraduate inorganic chemistry.
关键词
溶度积常数/碘化铅/滴定终点/离子交换法/电子pH计
Key words
solubility product constant/lead iodide/titration endpoint/ion exchange method/Electronic pH meter
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