对自制高锰酸钾纯度测定方法的探讨

The Exploration of the Measuring Method of the Purity of Potassium Permanganate

通过测定几种自制样品KMnO。的纯度，总结出适合于“大一”新生实验的测定KMnO4纯度的方法。在酸性（1m01．L^-1H2SO4）条件下，以草酸钠为基准物标定所配制样品KMnO4溶液的浓度，温度控制在55。85℃。从而计算出KMnO4的含量。

Obtained an optimum measuring method of the purity of potassium permanganate by determin- ing the purity of several potassium permanganate. And the measuring method is appropriate for experiment in freshman. The optimum measuring method is as follows： sodium oxalate was used as primary standard to standardize potassium permanganate solution in strong acidic condition （1 mol·L-1H2SO4）, the temperature of titration control in 55- 85℃