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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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- 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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- Água rica em minerais de cálcio e magnésio, principalmente carbonatos. Own research - by Marcelo Lino
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- Dureza da água é a propriedade relacionada com a concentração de íons de determinados minerais dissolvidos nesta substância. A dureza da água é predominantemente causada pela presença de sais de Cálcio e Magnésio, de modo que os principais íons levados em consideração na medição são os de Cálcio (Ca+) e (Mg+)
- Wikipedia
by Marcelo Lino - O tratamento da água dura para a retirada de Ca2+ e Mg2+ é conhecido por abrandamento ou amolecimento e consiste em fazer a água atravessar uma resina que captura os íons Ca2+ e Mg2+, substituindo-os por íons não prejudiciais ao homem, tais como o Na+ e o H+. - UENF
by Marcelo Lino - Related KudoZ question
Compare [close] Compare [close] - Greek
- Chemistry; Chem Sci/Eng
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- Σκληρό νερό είναι το νερό που περιέχει διαλυμένα άλατα μεταλλικών ιόντων Own research - by MChris
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- Όταν το νερό περιέχει μεγάλη ποσότητα διαλυμένων αλάτων, λέγεται σκληρό νερό. Το σκληρό νερό είναι ακατάλληλο για την πλύση με σαπούνι. - wikipedia
by MChris - Όταν το νερό αναφέρεται ως "σκληρό" αυτό σημαίνει απλά, ότι περιέχει περισσότερα μεταλλικά στοιχεία από το συνηθισμένο νερό. - Food-info
by MChris - Related KudoZ question
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