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  2. Water softening - Wikipedia

    en.wikipedia.org/wiki/Water_softening

    Water softening is the removal of calcium, magnesium, and certain other metal cations in hard water. The resulting soft water requires less soap for the same cleaning effort, as soap is not wasted bonding with calcium ions. Soft water also extends the lifetime of plumbing by reducing or eliminating scale build-up in pipes

  3. Dealkalization of water - Wikipedia

    en.wikipedia.org/wiki/Dealkalization_of_water

    Like water softeners, dealkalizers contain ion-exchange resins that are regenerated with a concentrated salt solution - NaCl. In the case of a water softener, the cation exchange resin is exchanging sodium (the Na + ion of NaCl) for hardness minerals such as calcium and magnesium. A dealkalizer contains strong base anion exchange resin that ...

  4. Why salt melts ice — and how to use it on your sidewalk - AOL

    www.aol.com/news/chemists-told-us-why-salt...

    “When salt is added to this system, the ions in salt are attracted to the water molecules in [the surface semi-liquid layer],” Viswanathan says. “The ions on the surface of the salt get ...

  5. Ion exchange - Wikipedia

    en.wikipedia.org/wiki/Ion_exchange

    This is accomplished by exchanging divalent cations (such as calcium Ca 2+ and magnesium Mg 2+) with highly soluble monovalent cations (e.g., Na + or H +) (see water softening). Another application for ion exchange in domestic water treatment is the removal of nitrate and natural organic matter. In domestic filtration systems ion exchange is ...

  6. Lime softening - Wikipedia

    en.wikipedia.org/wiki/Lime_softening

    Lime softening (also known as lime buttering, lime-soda treatment, or Clark's process) [1] is a type of water treatment used for water softening, which uses the addition of limewater (calcium hydroxide) to remove hardness (deposits of calcium and magnesium salts) by precipitation.

  7. List of cooling baths - Wikipedia

    en.wikipedia.org/wiki/List_of_cooling_baths

    Ice: Sodium chloride-20 1 to 3 ratio of salt to ice. Dry ice: Tetrachloroethylene-22 Dry ice: Carbon Tetrachloride-23 Dry ice: 1,3-Dichlorobenzene-25 Dry ice: o-Xylene-29 Liquid N 2: Bromobenzene-30 Dry ice: m-Toluidine-32 Dry ice: 3-Heptanone-38 Ice: Calcium chloride hexahydrate -40 1 to 0.8 ratio of salt to ice. Dry ice: Acetonitrile-41 Dry ...

  8. Molecular sieve - Wikipedia

    en.wikipedia.org/wiki/Molecular_sieve

    In 2001, an estimated 1200 kilotons of zeolite A were produced for this purpose, which entails water softening. [2] 4A molecular sieves are widely used to dry laboratory solvents. [7] They can absorb water and other species with a critical diameter less than 4 Å such as NH 3, H 2 S, SO 2, CO 2, C 2 H 5 OH, C 2 H 6, and C 2 H 4. Bottle of 4A ...

  9. The Easy Way to Melt Ice You Never Knew About (It’s Not Salt!)

    www.aol.com/easy-way-melt-ice-never-210537871.html

    While there are plenty of clever uses for salt, including fixing slippery surfaces, rock salt isn’t always easy to find once temperatures drop lower than the melting point of ice (32°F or 0°C).