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Question
Explain why HCl gas is collected by using upward displacement of air.
Explain
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Solution
It is about 1.28 times heavier (denser) than air, so it settles at the bottom of the gas jar, displacing lighter air upwards. It cannot be collected over water because it is highly soluble in it.
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Chapter 8: Study of Compounds: Hydrogen Chloride - Intext Question [Page 165]
