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我们看到什么现象? 紫色石蕊试液有什么作用?

继续思考. 我们看到什么现象? 紫色石蕊试液有什么作用?. 解决问题. 实验室有一瓶失去标签的无色溶液,可能是盐酸溶液,也有可能是氢氧化钠溶液,如何确定它是什么溶液?. 请规范作答:. 取 少量溶液 于试管中,滴加紫色石蕊溶液,观察现象 。 如果紫色石蕊变红, 说明 原溶液是盐酸;如果紫色石蕊变蓝, 说明 原溶液是氢氧化钠溶液。.

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我们看到什么现象? 紫色石蕊试液有什么作用?

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  1. 继续思考 我们看到什么现象? 紫色石蕊试液有什么作用?

  2. 解决问题 实验室有一瓶失去标签的无色溶液,可能是盐酸溶液,也有可能是氢氧化钠溶液,如何确定它是什么溶液? 请规范作答: 取少量溶液于试管中,滴加紫色石蕊溶液,观察现象。如果紫色石蕊变红,说明原溶液是盐酸;如果紫色石蕊变蓝,说明原溶液是氢氧化钠溶液。

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