Hygroscopy
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Hygroscopy is the ability of a substance to attract water molecules from the surrounding environment through either absorption or adsorption. Hygroscopic substances include sugar, honey, glycerol, ethanol, methanol, sulfuric acid, methamphetamine, iodine, many chloride and hydroxide salts, and a variety of other substances. Zinc chloride and calcium chloride, as well as potassium hydroxide and sodium hydroxide (and many different salts) are so hygroscopic that they readily dissolve in the water they absorb: this property is called deliquescence (see below). Sulfuric acid is not only hygroscopic in high concentrated form, its solutions are hygroscopic down to concentrations of 10 Vol-% or below. Because of their affinity for atmospheric moisture, hygroscopic materials may need to be stored in sealed containers. When added to foods or other materials for the express purpose of maintaining moisture content, such substances are known as humectants.
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GarantieWeitere Informationen
- Allgemeine Informationen
- GTIN 09786130657185
- Editor Frederic P. Miller, Agnes F. Vandome, John McBrewster
- Genre Chemie
- EAN 9786130657185
- Format Fachbuch
- Titel Hygroscopy
- Herausgeber Alphascript Publishing
- Anzahl Seiten 232
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