重铬酸钾容量法测铁,由于铁量不同,所得滴定度也不同,给计算出正确结果带来不便,甚至由于忽视这个问题,用一个单一的滴定度计算低含量(或高含量)铁的结果,造成较大的偏差。本文对不同铁量的滴定度作了研究。发现铁量按几何级数递减,滴定度之间的差值存在一个常数——0.01。以此常数校正后的滴定度计算试样含铁,可以得到良好的回收。用于生 Calcium dichromate volumetric method, due to different iron content, the resulting titer is also different, to calculate the correct results inconvenience, and even ignored this problem, with a single titer calculation of low (or high content) iron The result, causing greater deviation. In this paper, the titer of different iron has been studied. Found that the amount of iron decreased by the geometric series, there is a constant titer difference between - 0.01. Calculating the iron content of the sample with the titration corrected by this constant gives a good recovery. For students