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hard water

German translation: hartes Wasser


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English term or phrase:hard water
German translation:hartes Wasser
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11:28 Feb 20, 2009
English to German translations [PRO]
Science - Chemistry; Chem Sci/Eng
Additional field(s): Environment & Ecology
English term or phrase: hard water
Definition from antoine.frostburg.edu:
Hard water is water contaminated with compounds of calcium and magnesium. Dissolved iron, manganese, and strontium compounds can also contribute to the "total hardness" of the water, which is usually expressed as ppm CaCO3. Water with a hardness over 80 ppm CaCO3 is often treated with water softeners, since hard water produces scale in hot water pipes and boilers and lowers the effectiveness of detergents.

Example sentence(s):
  • Some laundry detergents do not produce as many suds in hard water, these are likely to be soap-based products and do not work as well in hard-water as detergent based products. water-treatment.org.uk
  • Hard water also contributes to inefficient and costly operation of water-using appliances. Heated hard water forms a scale of calcium and magnesium minerals that can contribute to the inefficient operation or failure of water-using appliances. Wilkes University
  • Clothes washed in hard water often look dingy and feel harsh and scratchy. sciLinks
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hartes Wasser
Hartes Wasser hat eine hohe Konzentration an Ca2+ and Mg2+ Ionen. Bei der Reaktion der Erdalkali-Ionen mit Seife entstehen Niederschläge, die sich auf Textilfasern ablagern und deren Entfärbung verursachen können.
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Marion Schweizer
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Summary of translations provided
5 +3hartes Wasser
Marion Schweizer


Translations offered

23 mins   confidence: Answerer confidence 5/5 peer agreement (net): +3
hartes Wasser

Definition from Universität Regensburg FB Chemie:
Hartes Wasser hat eine hohe Konzentration an Ca2+ and Mg2+ Ionen. Bei der Reaktion der Erdalkali-Ionen mit Seife entstehen Niederschläge, die sich auf Textilfasern ablagern und deren Entfärbung verursachen können.

Example sentence(s):
  • In hartem Wasser ist die Wirksamkeit der Seife stark eingeschränkt. Hartes Wasser bedeutet einen höheren Seifenverbrauch. Die bis zur vollständigen Ausfällung der Härtebildner zugesetzte Seife geht für den Waschprozess verloren. Darüberhinaus wird ein Teil der Seife auch noch benötigt, um die entstandene Kalkseife in der Waschlauge zu dispergieren. - Universität Regensburg FB Chemie  
  • Was ist hartes Wasser? Was macht das Trinkwasser hart? Trinkwasser enthält je nach Herkunft (Oberflächen-, Grund- oder Quellwasser) unterschiedliche Mengen der beiden Mineralstoffe Calcium und Magnesium. Die Härte von Wasser wird durch die Menge gelöster Calcium- und Magnesiumverbindungen ("Kalk") charakterisiert. Je höher der Gehalt, desto härter das Wasser. Das neue Wasch- und Reinigungsmittelgesetz (am 1. Mai 2007 in Kraft getreten) unterscheidet nur noch drei statt bisher vier Härtebereiche. Die Menge der im Wasser gelösten Calcium-Ionen (nicht jedoch der Magnesiumgehalt) entscheidet darüber, in welchen Härtebereich das Wasser einzuordnen ist. - Verband d. Energie- und Wasserwirtschaft  

water hardness = Wasserhärte
Marion Schweizer
Local time: 12:52
Native speaker of: Native in GermanGerman
PRO pts in category: 4

Votes in favor of/against selecting this as the best translation of the term asked
Yes  Dr. Anja Masselli
12 mins

Yes  Sabine Akabayov, PhD
2 hrs

Yes  Katrin Stepins
22 hrs
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