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亚硝酸在酸性溶液中能被高锰酸钾定量氧化成硝酸,根据这一反应,可以进行亚硝酸钠测定。在测毕亚硝酸钠溶液中,加入定量过量的硫酸亚铁,在强硫酸酸性介质中,硝酸钠被还原成氮的氧化物,过量的硫酸亚铁用标准高锰酸钾溶液滴定,计算出硝酸钠的含量。试剂:1.硫酸:1:1。2.高锰酸钾溶液:0.1N。3.硫酸亚铁溶液:0.25N。称取硫酸亚铁70克,镕于800毫升1:3的硫酸中,以水稀至1升。以标准
Nitrite can be quantitatively oxidized to nitric acid by potassium permanganate in an acidic solution. Based on this reaction, sodium nitrite determination can be performed. In measuring the completion of sodium nitrite solution, adding a quantitative excess of ferrous sulfate, sulfuric acid in strong sulfuric acid medium, sodium nitrate is reduced to nitrogen oxides, excessive ferrous sulfate titration with standard potassium permanganate solution to calculate Sodium nitrate content. Reagents: 1. Sulfuric acid: 1: 1.2. Potassium permanganate solution: 0.1N. 3. Ferrous sulfate solution: 0.25N. Weigh 70 grams of ferrous sulfate, Rong in 800 ml of 1: 3 sulfuric acid, diluted with water to 1 liter. By standard