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58问答库 > 永停滴定法指示终点原理是什么

永停滴定法指示终点原理是什么

2025-04-03 21:15:05

推荐回答（1个）

回答（1）：

化学计量点稍后，有允许微量过量的亚硝酸钠，即可与HCl反应产生HNO2，HN02及其分解产物NO是可逆电对，在电极上发生氧化还原反应，同时有电流通过电路，引起电流计指针突然偏转而不再回复
永停滴定法(dead-stoptitration)，又称双安培滴定法(doubleamperometrictitration)，或双电流滴定法，是根据滴定过程中电流的变化确定滴定终点的方法，属于电流滴定法。

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