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- Vodu, ktorá obsahuje väčšie množstvo rozpustených solí vápnika a horčíka, nazývame tvrdá voda. www.infovek.sk - by Maria Chmelarova
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- Podľa obsahu aniónov kyselín rozlišujeme prechodnú (uhličitanovú) a trvalú tvrdosť vody, ktorú spôsobujú najmä sírany.
- www.infovek.sk
by Maria Chmelarova - Tvrdá voda zvyčajne chutí lepšie ako mäkká voda. Rozpustené látky v tvrdej vode pomáhajú produkovať tvrdé zuby a kosti, vďaka prítomnosti uhličitanu a fosforečnanu vápenatého. - www.infovek.sk
by Maria Chmelarova - Nežiaduci prejav tvrdej vody je; tvorba vodného kameňa vo varných nádobách, teplovodných trubkách, ohrievačoch vody a kotloch, vyššia spotreba pracích prostriedkov. - www.mkw.sk
by Maria Chmelarova - Related KudoZ question
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- 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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- Apa dură: Conţine ioni de magneziu si calciu. Dacă acesta are mult carbonat de calciu nu face spumă cu săpunul. Apa dură poate deveni apă de băut prin eliminarea ionilor de magneziu si calciu şi înlocuirea lor cu sodiu. Duritatea apei poate fi temporară sau permanentă.
- Enciclopedie-RO
by Mihaela Petrican - Apa dură poate duce la îngreunarea multor activităţi casnice, inclusiv spălarea rufelor, detergenţii pentru rufe fără fosfaţi s-ar putea să nu înălbească aşa cum ne-am dori, sau murdăria poate să fie, în mod particular, foarte pregnantă. - Web article
by Mihaela Petrican - Related KudoZ question
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- Chemistry; Chem Sci/Eng
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- A vizet akkor nevezik keménynek, ha sok benne a kalcium- és a magnéziumion. Mértékegysége a német keménységi fok: 1 nkº 10 mg/l kalcium-oxiddal egyenértékű kalciumnak vagy magnéziumnak felel meg. Keménysége alapján az ivóvizet négy kategóriába sorolják: nagyon lágy, lágy, közép-kemény és kemény víz. Magyar Virtuális Enciklopédia - by Lingua.Franca
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- A víz keménységét német keménységi fokban (nkº) is kifejezhetjük. Egy német keménységi fok 10 milligramm/liter kálciumoxiddal egyenértékű kalcium és/vagy magnéziumionnak felel meg. - Hajdúszoboszlói Közüzemi Kft.
by Lingua.Franca - A víz keménységét a benne oldott kalcium- és magnéziumsók mennyisége határozza meg. Az ún. változó keménységet a kalcium- és magnézium-hidrogén-karbonát (Ca(HCO3)2 és Mg(HCO3)2) tartalom adja. - Osmosis Kft.
by Lingua.Franca - 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.
- Wikipedia
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
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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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- Chemistry; Chem Sci/Eng
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- Wanneer water 'hard' genoemd wordt, betekent dit simpelweg dat het meer mineralen bevat dan gewoon water. Deze mineralen zijn vooral calcium en magnesium. De mate van hardheid van water neemt toe, naarmate er meer calcium en magnesium in het water oplost. Wageningen Universiteit - by Max Nuijens
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- Wat is hard water?
Hard water, ofwel de hardheid van water zit hem voornamelijk in de mineralen calcium en magnesium. Wanneer deze mineralen zich binden noemen we dit kalk. Hard water is dus water met een (te) hoog gehalte aan kalk.
- Zacht Water waterontharders
by Max Nuijens - Hard water wordt voornamelijk veroorzaakt door de aanwezigheid van twee stoffen, die onontbeerlijk zijn voor onze gezondheid: calcium en magnesium. Hard water is dus gezond water.
Wanneer hard water verwarmd wordt boven 55° Celcius, of wanneer dit water in contact komt met lucht, bijvoorbeeld via de douchekop of aan de kraan, kan dit kalkafzetting veroorzaken. Bij elektrische apparaten, bijvoorbeeld koffiezetapparaten, vaatwasser of wasmachine, kan kalkafzetting leiden tot verlies van energierendement. Bij hard water moet je bij het wassen ook meer wasproduct gebruiken. In die gevallen kan het aangewezen zijn om een waterverzachter te installeren. Laat dit steeds uitvoeren door een geschoold vakman.
- Waterloket - Vlaamse Milieumaatschappij
by Max Nuijens - De hardheid van het water heeft te maken met de hoeveelheid kalk die in het water is opgelost. Eigenlijk gaat het om twee verschillende stoffen: calcium (kalk) en magnesium. Deze stoffen bepalen samen de hardheid van het water. Regenwater bijvoorbeeld, is van nature erg zacht. Maar voordat we er drinkwater van maken, heeft het een lange weg afgelegd als rivier- of grondwater. Onderweg neemt het mineralen, zoals kalk, op uit de bodem. Als er in de bodem van het gebied dus veel calcium en magnesium voorkomt, zal het drinkwater van nature hard zijn. Dat gehalte in de bodem is niet overal gelijk; de hardheid van het water verschilt dan ook van regio tot regio. - Waterbedrijf Groningen
by Max Nuijens - Related KudoZ question
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