soda water
Soda water (also called soda ) is water that has been enriched with carbon dioxide and belongs to the group of alkaline sourlings . Due to the sodium hydrogen carbonate (sodium bicarbonate / NaHCO 3 ) it also usually contains, it tastes slightly like lye (soapy). Well-known soda waters come from Fachingen , Karlsbad , Marienbad , Niederselters and Vichy . Soda water is also part of numerous long drinks and cocktails .
definition
The definitions are different in the individual states. In Germany, the following applies: “With table water that contains at least 570 milligrams of sodium hydrogen carbonate in one liter and carbon dioxide [d. H. Carbonic acid ] , the name of the food “table water” can be replaced by “soda water”. ”Colloquially,“ soda water ”also means table water with only carbon dioxide added. In Austria - according to Codex Alimentarius Austriacus - "[b] table water with a minimum content of 4 g / l carbon dioxide [...] can be called 'soda water'."
Soda water, as it was bottled in the siphon bottle invented by the Hungarian Benedictine Father Ányos Jedlik since 1826 , was produced in many small beverage producers that could be found in almost every place. These rarely exist today. In 2010 there were still around 22 small beverage manufacturers in Burgenland . In trading today are soda maker available, with those in restaurants easily and in private households and cheap from tap water can be produced soda water. However, these usually do not meet the German definition of soda water, as there is the necessary amount of carbonic acid, but not the necessary concentration of sodium hydrogen carbonate.
Soda water in chemistry
Joseph Priestley succeeded in producing soda water for the first time in 1772 by guiding sulfuric acid into a calcareous solution and dissolving the resulting carbon dioxide (CO 2 ) in a beaker of water.
Soda water in nature
Groundwater and surface water typically contain carbon dioxide. These waters exchange CO 2 with the atmosphere until a solution equilibrium is established with respect to the partial pressure in the gas phase. Deep waters that are under high rock pressure can dissolve CO 2 in high concentrations because they are under rock pressure. The condition is that CO 2 from volcanic or other, such as fossil sources is added. If such water is pumped while maintaining a certain pressure, the CO 2 content is retained without outgassing. It can be bottled as mineral or table water "with natural carbon dioxide".
The world's deepest soda lake is Lake Van in Turkey, it contains a lot of soda in addition to salt, i.e. sodium chloride and sodium carbonate.
Lakes that have dissolved higher concentrations of carbon dioxide (from volcanic origins, for example) in their deep water can release so large amounts of CO 2 when the water is suddenly turned upwards that humans and animals can suffocate.
Compare to: Carbon dioxide # Occurrence in fresh water
Web links
Individual evidence
- ↑ according to Food Information Regulation , previously sales description in terms of food labeling regulations , see the § 4 . The sales description must be given if prepackaged foods are placed on the market for commercial purposes (see Section 3 (1) No. 1).
- ↑ Section 14, Paragraph 1, Clause 2 of the Ordinance on Natural Mineral Water, Spring Water and Table Water (Mineral and Table Water Ordinance) (Germany).
- ↑ Dude definition of soda water .
- ↑ Austrian food book. Chapter B 17, Section 2.3.3. Accessed December 21, 2018 (pdf; 610.94 kB).
- ↑ Soda water producers are dying out. In: burgenland.orf.at. March 1, 2010, accessed March 1, 2010 .
- ^ Joseph Priestley , Wm Hey: Observations on Different Kinds of Air . In: Philosophical Transactions . 62, 1772, pp. 147-264. doi : 10.1098 / rstl.1772.0021 .