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在工业分析中,常将铋(V)含氧酸及其盐最突出的化学性质——氧化性,做为定性检验溶液中是否存在Mn~(2+)的重要反应之一。具体作法是:将待测溶液用稀HNO_3酸化,加入少许固体NaBiO_3微热,若观察到溶液出现紫红色,即证明待测液中含有Mn~(2+)。其化学反应式为: 2Mn~(2+)+5BiO_3~-+14H~-= 2MnO_4~-5+5Bi~(3+)+7H_2O(A) 然而,若改变酸的种类、酸的加入量以及各反应物质加入的先后顺序等实验条件,
In industrial analysis, the most prominent chemical property of the oxoacids and their salts of bismuth (V), the oxidizing nature, is often used as one of the important reactions to qualitatively test for the presence of Mn 2+ in solution. The specific practice is: the test solution diluted with dilute HNO_3 acidification, add a little solid NaBiO_3 slightly hot, if the solution appears purple, that is to be tested solution containing Mn ~ (2+). The chemical reaction formula is: 2Mn ~ (2 +) + 5BiO_3 ~ - + 14H ~ - = 2MnO_4 ~ -5 + 5Bi ~ (3 +) + 7H_2O (A) However, if the kind of acid is changed, The order of addition of reaction materials and other experimental conditions,