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 can use it to demonstrate gas solubility. Orders for schools, colleges, tender contractors and distributors are handled by Science Lab Supplies from Ambala, India.
Specifications
The fountain set's few parts are each given a row below. In short, 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 water, which is drawn up to form the fountain.
| Specification | Value |
|---|---|
| SKU | LSK-CL-10033 |
| Flask | Round bottom flask |
| Stopper | Rubber stopper fitted in the flask |
| Jet tube | Glass, through the centre of the stopper |
| Orientation in use | Flask inverted, one end of the tube dipped into water |
| Effect | Water rises up the tube and forms a fountain-like jet |
| Application | Fountain experiment |
| 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, for example with Phenolphthalein Solution Indicator turning pink in alkali, then checking the trough water on Universal Ph Indicator paper (pH 0–14).
- 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, so the whole demonstration is priced at once.
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. A short note on the contact page or a list saved in the enquiry cart is enough to start a price for fountain sets, while the lab tender page covers government and institutional bids.
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, but they can be added to the same quotation as separate lines.
Who supplies the Apparatus Fountain Experiment?
Science Lab Supplies in Ambala, India, supplies the fountain set as a sourced item and can quote the stands, clamps, spare flasks and indicators needed to run the demonstration on the same offer.
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
Running the fountain experiment calls for spare flasks, bored stoppers, glass tubing, a gas source and a stand to hold the inverted flask. The items below cover those needs from the Chemistry Lab range, so the complete demonstration can be listed on one quotation with the fountain apparatus.
- Round Bottom Pots (Spherical Flasks) — 500 ml round-bottom glass flask with a long mouth.
- Rubber Stoppers of Various Diameters with Holes — bored stoppers with 11, 13, 14 and 15 mm bottom diameters.
- Glass Tubes of Different Diameters — 100 mm lengths from 5–6 mm up to 12–13 mm diameter.
- Simple Gas Preparation Kit — plastic tank, five 150 x 24 mm test tubes, thistle funnel and delivery tube for gases collected over water.
- Kipps Apparatus — 250 ml classic Kipp generator producing gases from an acid and a solid without heating.
- Laboratory Retort Stand — cast iron base with a 600 mm stainless steel rod.
- Three Prong Glassware Holding Clamp — vinyl-sleeved jaws opening from 15 to 85 mm.
Browse the full Chemistry Lab range, the Lab Chemicals range for indicators, or all school lab equipment.
Last updated: 9 October 2026
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