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稀硝酸

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稀硝酸

稀硝酸

  硝酸分子式為HNO3,純HNO3是無色有刺激性氣味的液體,市售濃硝酸質量分數約為65%,密度約為1.4g/cm3,沸點為83℃,易揮發,可以任意比例溶于水,混溶時與硫酸相似會釋放出大量的熱所以需要不斷攪拌,并且只能是把濃HNO3加入水中而不能反過來。濃度在(86%~97.5%)98%的硝酸叫“發煙硝酸”,因這種酸更易揮發,遇潮濕空氣形成白霧,有腐蝕性并且有毒要注意戴聚乙烯塑料手套以及特別的口罩。
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