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How will you test for the gas which is liberated when hydrochloric acid reacts with an active metal?

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter8: Bonding In Transition Metal Compounds And Coordination Complexes

Section: Chapter Questions

Problem 11P

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Question

How will you test for the gas which is liberated when hydrochloric acid reacts with an active metal?

Expert Solution

Step 1

Metals react with acids to give H₂ gas.

Active metals are the metals that reacts strongly with other substances. Alkali metals are the examples of active metals.

Here, active metal reacts with HCl to give H₂ gas and Metal chloride.

By passing the gas obtained from the reaction of active metal with hydrochloric acid into a soap solution produces H₂ bubbles. When a lit candle is kept into the bubble it burst out giving a pop sound and the light exhausts. The pop sound indicates that the gas present is H₂ gas.

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