CHEMISTRY GLOSSARY
ionic conductor → ionski vodič
Ionic conductor is a material that conducts electricity with ions as charge carriers.
mineral water → mineralna voda
Mineral water is a groundwater that rises to the surface through a natural opening in the earth or rock and contains a relatively high concentration of mineral ions and trace of elements which can be radioactive or thermal.
deionised water → deionizirana voda
Deionised water is water from which ionic salts have been removed by ion-exchange. It is used for many purposes as an alternative to distilled water.
| Type of water | Conductivity / µScm-1 |
|---|---|
| Ultrapure water | 0.05 |
| Distilled water | 0.5 |
| Tap water | 50 |
| Ocean water | 50 000 |
distilled water → destilirana voda
Distilled water is water purified by distillation so as to free it from dissolved salts and other compounds. Distilled water in equilibrium with the carbon dioxide in the air has conductivity of about 0.8×10-6 S cm-1. Repeated distillation in vacuum can bring conductivity down to 0.043×10-6 S cm-1 at 18 °C. The limiting conductivity is due to self ionisation
soft water → meka voda
Soft water is any water that does not contain large concentrations of the dissolved minerals calcium or magnesium.
standard mean ocean water → standardna prosječna oceanska voda
Standard mean ocean water (SMOW) is a standard sample of pure water of accurately known isotopic composition which is maintained by the International Atomic Energy Agency. It is used for precise calibration of density and isotopic composition measurements.
thermal conductivity → toplinska vodljivost
Thermal conductivity (Λ) is rate of heat flow divided by the area and by the temperature gradient.
waste water → otpadna voda
Waste waters are waters which pour down from housing, public or industrial plants and are polluted with mineral and organic substances and microorganisms.
heavy water → teška voda
Water molecules are composed of two hydrogen atoms and one oxygen atom (H2O). If the hydrogen atoms of a water molecule are replaced by deuterium atoms, the result is heavy water (D2O). Deuterium differs from hydrogen by having one neutron in the nucleus of the atom. There is approx. one part in 5000 D2O in normal water and it can be concentrated by electrolysis. Heavy water has a higher boiling point (101.4 °C) and melts at 3.6 °C. Heavy water is 20/18=1.11 times heavier than ordinary water.
hydrogen → vodik
Hydrogen was discovered by Sir Henry Cavendish (England) in 1766. The origin of the name comes from the Greek words hydro and genes meaning water and generate. It is colourless, odourless gas, burns and forms explosive mixtures in air. Reacts violently with oxidants. Hydrogen is the most abundant element in the universe. Commercial quantities of hydrogen are produced by reacting superheated steam with methane or carbon. In lab work from reaction of metals with acid solutions or electrolysis. Most hydrogen is used in the production of ammonia and in metal refining. Also used as fuel in rockets. Its two heavier isotopes (deuterium and tritium) used respectively for nuclear fusion.
Citing this page:
Generalic, Eni. "Omekšivač vode." Croatian-English Chemistry Dictionary & Glossary. 29 June 2022. KTF-Split. {Date of access}. <https://glossary.periodni.com>.
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