Collecting a Dry Sample of a Gas

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Collecting a Dry Sample of a Gas

Question

The set up below was used to collect a dry sample of a gas
Chemistry Form 4

Chemistry Form 4

Give two reasons why the set up cannot be used to collect carbon (IV) oxide.

Answer

i) The Co² will react with the CaO as it is basic.
ii) Because of wrong method of collection. Co² is denser than air

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