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一、高锰酸钾溶液的准备为了配制较稳定的KMnO4溶液,常称取稍多于理论量的KMnO4,溶解在规定体积的蒸馏水中。如配制C(1/5KMnO4)=0.1mol/L的标滴定溶液,可称取3.3g高锰酸钾溶于1050ml蒸馏水中,将配制好的KMnO4溶液加热至沸并保持微沸约1小时,放置2～3天,然后用微孔玻璃漏斗过滤,除去析出的沉淀,将过滤后的KMnO4溶液贮存于棕色试剂瓶中,以待标定。
First, the preparation of potassium permanganate solution In order to prepare a more stable KMnO4 solution, often said to take slightly more than the theoretical amount of KMnO4, dissolved in the specified volume of distilled water. Such as the preparation of C (1 / 5KMnO4) = 0.1mol / L standard titration solution, weighed 3.3g potassium permanganate dissolved in 1050ml of distilled water, the prepared KMnO4 solution was heated to boiling and keep slightly boiled for about 1 hour, Place 2 to 3 days, and then filtered through a microporous glass funnel to remove the precipitate precipitation, the filtered KMnO4 solution was stored in a brown reagent bottle to be calibrated.