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Powered by household baking powder, it surfaces and dives over and over again.
Sometimes the simplest experiments are the most impressive. Watch as the density of the sub changes causing it to float and sink in the water!
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This diving sub toy is a fantastic gift for curious kids and is part of a large range of science kits &?resources. Use for engaging science at home or in the classroom!
This experiment is all about density & buoyancy.? You’ll notice that there is a small hole in the compartment where you place the baking soda. As the submarine sinks, the baking soda becomes wet which releases carbon dioxide gas. This is because baking soda contains both?baking soda?(sodium bicarbonate) and a dry acid (tartaric acid). When water is added to a baking recipe, these two ingredients react to form bubbles of carbon dioxide gas.
This carbon dioxide gas creates just enough buoyancy for the submarine to rise again. The carbon dioxide gas is then released once the submarine surfaces, which then sends the submarine back under water again to repeat the process!?By itself, the plastic submarine is too dense to float on the water.
NaHCO3?+ KHC4H4O6?? KNaC4H4O6?+ H2O + CO2
Sodium bicarbonate + Tartaric Acid reacts to produce Potassium sodium tartrate, water and carbon dioxide.
In 1953,?Benjamin and Harry Hirsch noticed that you could use baking powder to make small toy submarines to rise and fall in water. They sold this idea to the Kelloggs who in 1954 exchanged over a million diving subs in with consumers who had sent in 25c and one cereal boxtop.
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We would definitely book this again!
On behalf of the Powerhouse Discovery Center, Castle Hill, I would like to thank you for contributing to our April School Holiday Program: Stories from the Far East. Your Kite Flight Physics workshop was a wonderful addition to the program! We thank you for your time, support and commitment and will see you again soon.
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