Limestone Cycle (Natural)
Year of production: 2016
Duration: 07:04 minutes
The subject of this film is the natural limestone cycle. Calcium carbonate is practically insoluble in pure water. But if the carbonated water flows over limestone the calcium carbonate reacts with the carbonic acid to form calcium hydrogen carbonate. That is however very soluble in water. Water in which lots of calcium hydrogen carbonate is dissolved is called hard water. If hard water evaporates or vaporizes, the mixture of dissolved carbon dioxide, carbonic acid and calcium hydrogen carbonate turns back into calcium carbonate and carbon dioxide. The carbon dioxide escapes as gas into the atmosphere, the insoluble calcium carbonate remains.
At the end of the purchase process you can choose between the delivery types
Download and USB stick.
No GEMA fee.
Protected by copyright.
Classroom license for unlimited use in your lessons
School license for unlimited use at your entire school
Flatrates are subject to the license conditions stated in the product text