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一、前言容量沉淀测定中的摩尔法滴定有着重要的实践价值,尤其在水的分析中更具有意义,例如,氯度的测定常为水分析中的主要项目,测定海水的氯度后,即可根据氯度的大小来估计海水中其他主要成份的含量。对大陆水来说,普遍调查各地区水源的氯化物的成份和含量对掌握水源资料有着重大意义,而水中氯度的测定,常以摩尔法为准。摩尔滴定是在中性或弱碱性(pH约在6.5～10之间)的溶液中,以铬酸钾为指示剂,用硝酸银标准溶液滴定卤化物的分析方法。由于氯化银的溶解度小于
I. INTRODUCTION Mohold titration in the determination of volumetric precipitation has important practical value, especially in the analysis of water. For example, the determination of chlorinity is often the main item in water analysis. After measuring the chlorinity of seawater, According to the size of the chlorinity to estimate the content of other major components of the sea water. For continental water, it is of great significance to investigate the composition and content of chloride in water sources in various regions to master the water source data. However, the determination of chlorinity in water is usually based on the molar method. Molar titration is a neutral or weak alkaline (pH between about 6.5 to 10) solution, potassium chromate as an indicator, with silver nitrate standard titration of halide analysis. Due to the solubility of silver chloride is less than