What does the fountain experiment show about ammonia?

The properties of ammonia can be shown in a fountain experiment. A few drops of water are injected into the flask and they dissolve some of the ammonia gas. This decreases the pressure in the flask and sucks in the water from the beaker. The indicator turns blue upon contact with the ammonium solution.

What is the Colour of the fountain in ammonia?

This water, in turn, absorbs a little more ammonia. This continuous exchange creates a chain reaction that causes the solution to come rushing into the top flask. The solution turns pink because of the basic activation of the indicator in the water.

What does the fountain experiment demonstrate?

This shows that HCl gas present in the flask dissolves in water due to its high solubility. – Hence, the fountain experiment shows us that the HCl gas dissolves in water due its high solubility in it and is acidic in nature as the blue litmus solution turns into a red fountain.

Why does ammonia have a very high solubility in water?

Ammonia gas is very soluble in water. The relatively high solubility is attributed to the hydrogen bonding that takes place between the ammonia and water molecules. A small amount of the dissolved ammonia reacts with water to form ammonium hydroxide, which dissociates into ammonium and hydroxide ions.

For which gas ammonia fountain experiment can be used?

So, the correct answer is Ammonia and hydrogen chloride gas.

What will ammonia do to you?

Exposure to high concentrations of ammonia in air causes immediate burning of the eyes, nose, throat and respiratory tract and can result in blindness, lung damage or death. Inhalation of lower concentrations can cause coughing, and nose and throat irritation.

Does ammonia attract water?

Hope your prepration is going well. Ammonia is NH3 due to the lone pair at the nitrogen the lone pairs in oxygen from the H2O are attracted forming hydrogen bonds consequently being soluble in water .

What happens when ammonia is mixed with water?

Ammonia gas dissolves easily in water to form ammonium hydroxide, a caustic solution and weak base. Ammonia gas is easily compressed and forms a clear liquid under pressure.

What are uses of ammonia?

About 80% of the ammonia produced by industry is used in agriculture as fertilizer. Ammonia is also used as a refrigerant gas, for purification of water supplies, and in the manufacture of plastics, explosives, textiles, pesticides, dyes and other chemicals.

Why is ammonia alkali?

Ammonia is a weak base because its nitrogen atom has an electron pair that readily accepts a proton. Also, when dissolved in water, ammonia acquires hydrogen ions from water to produce hydroxide and ammonium ions. It is the production of these hydroxide ions that imparts ammonia its characteristic basicity.

What happens when you put water in an ammonia fountain?

As the flask cools the pressure drops and the constant atmospheric pressure pushes the water up the straw. Once the water reaches the ammonia, the ammonia gas molecules dissolve in the water further reducing the pressure pushing down the straw causing the still constant pressure of the atmosphere to push the water up the straw even faster.

How does a teacher make an ammonia fountain?

The ammonia fountain is a classic demonstration in which students observe the very high solubility in water of ammonia and identify that ammonia solution is alkaline. The teacher fills a flask, fitted with a glass jet, with dry ammonia, before injecting water into the flask. This dissolves the ammonia and causes a fountain via the jet.

Is the sulfuric acid in the ammonia fountain toxic?

Ammonia is toxic by inhalation. Sulfuric acid (1 M) is an irritant. Concentrated ammonia solution (35 per cent) is corrosive and can burn the skin; it also has a toxic vapour. Phenolphthalein solution is highly flammable. Dispose of all products down the sink in the fume cupboard using plenty of cold water.

Why does ammonia dissolve in a drop of water?

Ammonia NH 3 is highly soluble in water. And thus, some of the ammonia from the flask quickly dissolves in a drop of water on the tip of the plastic tube. As a result, pressure in the flask decreases, and water rushes in because of a pressure drop relatively to atmospheric pressure.