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- Chemistry; Chem Sci/Eng
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- 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. antoine.frostburg.edu
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- 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
![](https://cfcdn.proz.com/images/wikiwords/small_grey_arr.gif) - 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
![](https://cfcdn.proz.com/images/wikiwords/small_grey_arr.gif) - Clothes washed in hard water often look dingy and feel harsh and scratchy. - sciLinks
![](https://cfcdn.proz.com/images/wikiwords/small_grey_arr.gif) Compare [close] - Turkish
- Chemistry; Chem Sci/Eng
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- İçerisinde başta kalsiyum ve magnezyum tuzları olmak üzere nispeten yüksek miktarda çözünmüş tuz içeren su. DSİ Hidroloji Sözlüğü - by Selcuk Akyuz
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- Evsel kullanımlarda ise; sert su ile yıkanan giysiler, zamanla, solar ve sertleşir. - CRS
by Selcuk Akyuz - Sert sular özellikle mutfak yağlarıyla birleşerek giderlerde tıkanmayı hızlandırır - arsimak
by Selcuk Akyuz - Related KudoZ question
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- Chemistry; Chem Sci/Eng
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- Твърда вода е вода с високо съдържание на минерали, обикновено калциеви и магнезиеви (Mg2+) йони, и в някои случаи други разтворени елементи като бикарбонати и сулфати. Противоположното понятие е мека вода - вода с ниско минерално съдържание.
Калцият във водата обикновено се намира или като калциев карбонат (CaCO3) или като калциев сулфат (CaSO4). Wikipedia - by bibienne (X)
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- Твърда вода е вода с високо съдържание на минерали, обикновено калциеви и магнезиеви (Mg2+) йони, и в някои случаи други разтворени елементи като бикарбонати и сулфати.
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by bibienne (X) - Ефективността на перилните препарати при употреба в твърда вода се понижава многократно, в резултат на получаването на неразтворими калциеви и магнезиеви соли на висшите мастни киселини. - Internetreklama
by bibienne (X) - Related KudoZ question
Compare [close] - Croatian
- Chemistry; Chem Sci/Eng
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- Tvrda voda je uzrokovana prisustvom otopljenih soli kalcija i magnezija (nekada i željeza). Prolazna (privremena) tvrdoća potiče od kalcija i hidrogenkarbonata i uklanja se kuhanjem.Stalna tvrdoća se odnosi na sulfate i kloride kalcija i magnezija. Wikipedia - by vladowsky
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- Vode s mineralnih i termalnih izvora obiluju kalcijem i magnezijem i uvijek imaju visoki stupanj tvrdoće. Kada govorimo o konzumnoj vodi, problem se ne zove TVRDA VODA nego KAMENAC koji se javlja kao posljedica transporta kroz vodovodne instalacije i promjene pritiska i temperature tijekom njezina iskorištavanja. Omekšana voda potrebna je u mnogim proizvodnim procesima ali nije pogodna za ljudsko zdravlje. - Agromarketing
by vladowsky - Related KudoZ question
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- Chemistry; Chem Sci/Eng
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- En química, el agua dura (por contraposición al agua blanda) es aquella que posee una dureza superior a 120 mg CaCO3/l. Es decir que contiene un alto nivel de minerales, en particular sales de magnesio y calcio. Son éstas las causantes de la dureza del agua, y el grado de dureza es directamente proporcional a la concentración de sales metálicas. Wikipedia - by Laura Mangini
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- El agua dura puede volver a ser blanda, con el agregado de carbonato de sodio o potasio, para precipitarlo como sales de carbonatos, o por medio de intercambio iónico con salmuera en presencia de zeolita o resinas sintéticas - Wikipedia
by Laura Mangini - Related KudoZ question
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- Жёсткость воды — совокупность химических и физических свойств воды, связанных с содержанием в ней растворённых солей щёлочноземельных металлов, главным образом, кальция и магния. Вода с большим содержанием таких солей называется жёсткой, с малым содержанием — мягкой.
По величине общей жёсткости различают воду мягкую (до 2 мг-экв/л), средней жесткости (2-10 мг-экв/л) и жёсткую (более 10 мг-экв/л). Жёсткость воды поверхностных источников существенно колеблется в течение года; она максимальна в конце зимы, минимальна — в период паводка (например, жёсткость волжской воды в марте — 4,3 мг-экв/л, в мае — 0,5 мг-экв/л[1]). В подземных водах жёсткость обычно выше (до 80-100 мг-экв/л) и меньше изменяется в течение года.
wikipedia - by Leila Usmanova
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- Жесткостью воды называется сумма растворенных в воде ионов кальция Са2+ и магния Mg2+.
Жесткость – это наиболее распространенная проблема качества воды. Первоначально термин «жесткая вода» применялся к воде, стирка в которой была затруднена.
- .
by Leila Usmanova - Related KudoZ question
Compare [close] - Danish
- Chemistry; Chem Sci/Eng
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- Vand der indeholder Ca++, Mg++, Fe++ eventuelt HCO3--ioner. Er totalhårdheden i °dH mellem 10-20, betegnes vandet hårdt vand. Over 20 er meget hårdt vand. Hårdhedsgrader mellem 2-5 er blødt vand og mellem 5-10 mellemhårdt vand. Danmarks miljøundersøgelser; Miljøord - by medtranslation
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- I Østdanmark er der kalk i jorden, og det sure vand opløser kalken. Herved mister vandet sin sure egenskab; det bliver neutralt, men det har til gengæld fået et indhold af kalk. Som drikkevand kaldes dette vand for hårdt vand. Hårdt vand giver anledning til kedelsten ved kogning, og et øget forbrug af vaskemiddel ved tøjvask. - GEUS
by medtranslation - Hvis tilstedeværelse af hårdt vand fremmer dannelse af hårde stop i vandlåsene ved forbindelser med calcium og magnesium i skyllevandet, burde der forventes større problemer i områder med hårdt vand. Især i Østdanmark er der store områder med hårdt vand. - Miljøstyrelsen
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