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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 as shown in the picture below.
The gas that is more dense
than air falls to the bottom
of the gas jar. The air in the gas jar is
displaced until the gas jar
is filled with the collected gas.
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