406623
Beschreibung
Karteikarten von rosetinley, aktualisiert more than 1 year ago
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Erstellt von rosetinley
vor mehr als 10 Jahre
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| Frage | Antworten |
| Soft Water | Water containing no dissolved calcium and/or magnesium salts, so it easily forms a later with soap |
| Hard Water | Water in which it is difficult to form a lather with soap Water containing calcium and/or magnesium ions which react with soap to form scum |
| Scum | The precipitate formed when soap reacts with calcium or magnesium ions in hard water |
| Soapless Detergents | A cleaning agent that does not produce scum when used with hard water |
| Scale (limescale) | The insoluble substance formed when temporary hard water is boiled |
| Temporary Hard Water | Hard water which is softened when it is boiled |
| Permanent Hard Water | Hard water whose magnesium and/or calcium ions are not removed when the water is boiled, thus remaining hard |
| Ion-Exchange Column | A water softener which works by replacing calcium and magnesium ions with sodium or hydrogen ions, removing the hardness |
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