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用向上排空气法收集氧气时，导管口为什么要伸到集气瓶

2025-03-16 15:58:26

推荐回答（4个）

回答1：

向上排空气法收集的是密度比空气大的气体,所以将导管伸入瓶底是为了将空气从底部排出,而收集的气体将沉在底部.

回答2：

如果不接近底部,氧气很容易会漏走,其次,空气与氧气密度相差不大,接近底部.确保氧气纯净

回答3：

导气管伸到集气瓶底部有利于快速收集纯净气体。

回答4：

用排水法和向上排空气法收集氧气

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