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化学中怎样区分盐和碱
更新时间: 2020-10-31 00:00:00  

盐是颗粒状,味咸;碱是粉末状,味涩。化学区分的话可以将盐和碱分别放入两支试管中,再分别向两支试管中滴加CaCL2(氯化钙)溶液,若有沉淀生成的为碱,没有则为食盐。碱指在水溶液中电离出的阴离子全部都是OH-的物质;盐主要成分是氯化钠,还有有钡盐、氯化物、镁、铅、砷、锌、硫酸盐等杂质。

关键词: 化学 怎样 区分

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