Collecting Gas.

How is a Gas Collected using Downward Delivery?

A gas that is more dense than air can be collected
by downward delivery.
Examples of gases that can be collected by this method
are carbon dioxide, chlorine, hydrogen chloride and sulfur dioxide.

A gas jar is connected by a tube to the flask that is giving off the gas.

Collecting Gas using Downward Delivery

The more dense gas
falls
to the bottom of the gas jar and displaces the air.

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