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SO3能使品红溶液褪色吗

更新时间: 2020-10-02 00:00:00     

三氧化硫不能使品红溶液褪色,能使品红溶液褪色的是二氧化硫,二氧化硫的漂白原理是二氧化硫与水化合成亚硫酸,亚硫酸与品红发生加成反应,生成不稳定的无色化合物,使品红溶液褪色,此反应是可逆的,在加热条件下,无色化合物又会分解成品红和亚硫酸,亚硫酸继而分解成二氧化硫和水。

关键词: so3 溶液 褪色

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