Apparatus Fountain Experiment
Product Code : LSK-CL-10033
Apparatus Fountain Experiment (SKU LSK-CL-10033) is the glassware for the fountain experiment: a round bottom flask closed by a rubber stopper with a glass jet tube through its centre. With the flask inverted and the tube dipped in water, water rises up the tube and sprays into the flask as a fountain-like jet. Chemistry teachers use it to demonstrate gas solubility. Science Lab Supplies provides it from Ambala, India, for schools, colleges, tender contractors and distributors.
Specifications
The set is simple: a glass jet tube passes through the centre of a rubber stopper that seals a round bottom flask. In use the flask is inverted and clamped so the free end of the tube dips into a trough of water, and the water is drawn up the tube to form the fountain.
| Parameter | Value |
|---|---|
| SKU | LSK-CL-10033 |
| Flask | Round bottom flask, used inverted |
| Stopper | Rubber stopper with central glass jet tube |
| Operation | Tube end dipped in water; water rises up the tube as a fountain-like jet |
| Supplied by | Science Lab Supplies, Ambala, India |
Applications and Experiments for the Fountain Experiment Apparatus
The fountain experiment shows how very soluble a gas can be in water. The flask is filled with a highly soluble gas; once a little water enters, the gas dissolves, the pressure inside falls, and atmospheric pressure drives water up the jet. An indicator in the water adds a colour change.
- Secondary chemistry: demonstrating the high solubility of ammonia or hydrogen chloride gas in water.
- Acids and bases lessons: showing the alkaline or acidic nature of the dissolved gas with an indicator.
- Physics of pressure: linking a drop in internal pressure to atmospheric pressure pushing water upwards.
Ammonia and hydrogen chloride are toxic and corrosive gases. Fill the flask in a fume cupboard, keep students at a safe distance and run the demonstration under teacher supervision.
Standard Scope of Supply
Each set comprises the round bottom flask and the rubber stopper fitted with its central glass jet tube. The gas, the indicator, a water trough and a stand with clamp to hold the inverted flask are separate items; school chemistry lab equipment such as these can be quoted alongside.
Packing, MOQ and Lead Time
Request a price for one demonstration set or several for a department, and the quotation will list packing, delivery time and price for that number. Stands, spare flasks and a gas preparation kit can go on the same quotation.
With an Importer-Exporter Code, Science Lab Supplies operates as a registered exporter and can ship to buyers in Kenya, Ghana, Ethiopia, Tanzania, Uganda and the UAE. You can reach us on the contact page, save items in the enquiry cart, or check the lab tender page for bulk and tender buying.
Frequently Asked Questions
What does the fountain experiment demonstrate?
It demonstrates that some gases, such as ammonia and hydrogen chloride, dissolve so readily in water that the pressure in the flask drops sharply and water is forced up the tube as a jet.
What is included in the set?
A round bottom flask and a rubber stopper with a glass jet tube through its centre. Gases, indicator, trough and stand are not included.
Who supplies the Apparatus Fountain Experiment?
Science Lab Supplies supplies it from Ambala, India, along with the items needed to run the demonstration.
Is the demonstration safe for a classroom?
The glassware itself is simple, but the gases used are hazardous. Prepare and fill the flask in a fume cupboard and let only the teacher handle the gas.
Related Gas Demonstration Items
To run the fountain experiment a laboratory needs spare flasks, bored stoppers, glass tubing and a way to prepare the gas. The four items below cover those needs, so the complete demonstration can be listed on one quotation with the fountain apparatus.
- Round Bottom Pots (Spherical Flasks) — spare flasks for repeat demonstrations.
- Rubber Stoppers of Various Diameters with Holes — replacement bored stoppers.
- Glass Tubes of Different Diameters — for making or replacing jet tubes.
- Simple Gas Preparation Kit — for generating the gas used to fill the flask.
Browse the full Chemistry Lab range or all school lab equipment.
Last updated: 25 September 2026
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