Describe fountain experiment to demonstrate the following properties of ammonia
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This experiment allows us to prove the extremely high solubility of ammonia in water. A similar experiment is carried out for hydrogen chloride gas.

The diagram explains enough about the set -up.
When the syringe is pushed, water enters the inverted flask containing ammonia gas. This gas is highly soluble thus it dissolves almost immediately in it and reduces the pressure in the flask. As the atmospheric pressure outside is more than the pressure inside the flask, it pushes down on the indicator in the beaker and forces it to enter the flask. This creates a fountain like feature as it enters the flask and changes colour due to ammonia's basic nature

The diagram explains enough about the set -up.
When the syringe is pushed, water enters the inverted flask containing ammonia gas. This gas is highly soluble thus it dissolves almost immediately in it and reduces the pressure in the flask. As the atmospheric pressure outside is more than the pressure inside the flask, it pushes down on the indicator in the beaker and forces it to enter the flask. This creates a fountain like feature as it enters the flask and changes colour due to ammonia's basic nature
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