四川农业大学 题目:氯化物中氯含量的测定 姓名: 氯化物中氯含量的测定 摘要:某些可溶性氯化物中氯的含量可用银量法测定。银量法按指示剂不同可分为莫尔法、佛尔哈德法、和法扬司 法。本文采用银量法中的莫尔法测定氯化物中氯的含量。以K2CrO4 为指示剂,用NaCl 基准物质溶液标定 AgNO3 标 准溶液。再用 AgNO3 标准溶液在 PH 为6.5~10.5 的条件下滴定粗盐样品。通过计算得 AgNO3 标准溶液的浓度为 0.02390mol·L-1,RSD 为0.40%;粗盐中氯的含量为 57.64%,RSD 为0.09%。此方法方便高效适用于水溶液中氯的测 定。 关键词:银量法、莫尔法、氯化物、含量 The determination of chlorine content in the chloride Abstract:The chlorine content of some soluble chloride can be determined by argentometry. Argentometry according to the indicator can be divided into different Mohr Method ,Voihard and Fajans. In this paper, the content of chlorine in chloride was determined by Mohr menthod. Using K2CrO4 as an indicator, AgNO3 standard solution is calibrated by NaCl standard substance solution. Then, at PH 6.5~10.5 use AgNO3 standard solution titrate coarse salt. Through the calculation ,the concentration of AgNO3 standard solution is 0.02390mol·L-1,RSD is 0.40%;the chlorine content of coarse salt is 57.64%,RSD is 0.09% . Keywords: argentometry, Mohr Method,chlorine,content 1.