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  2. Water softening - Wikipedia

    en.wikipedia.org/wiki/Water_softening

    The most common means for removing water hardness rely on ion-exchange resin or reverse osmosis. Other approaches include precipitation methods, such as fluidized bed pellet softening, [6] and sequestration by the addition of chelating agents. Distillation and reverse osmosis are the most widely used two non-chemical methods of water softening.

  3. Calcium Lime Rust - Wikipedia

    en.wikipedia.org/wiki/Calcium_Lime_Rust

    Rust, which is primarily composed of iron oxides (Fe 2 O 3), also reacts with weak acids to form soluble iron salts. The reaction can be simplified as: Fe 2 O 3 + 6H + → 2Fe 3+ + 3H 2 O. In this process, iron ions (Fe 3+) are produced along with water, making the rust easier to remove without causing damage to the underlying metal or ...

  4. Stain removal - Wikipedia

    en.wikipedia.org/wiki/Stain_removal

    Stain removal is the process of removing a mark or spot left by one substance on a specific surface like a fabric. A solvent or detergent is generally used to conduct stain removal and many of these are available over the counter.

  5. Dealkalization of water - Wikipedia

    en.wikipedia.org/wiki/Dealkalization_of_water

    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 exchanges chloride (the Cl – ion of the NaCl) for carbonate (CO − 3), bicarbonate (H C O − 3) and sulfate (SO 2− 4). As ...

  6. You Can Use Vinegar and Baking Soda To Remove Rust - AOL

    www.aol.com/lifestyle/vinegar-baking-soda-remove...

    Once you've removed the rust, rinse the object with clean water to remove any remaining vinegar-and-salt residue and place it back into the container with fresh water. Add two tablespoons of ...

  7. Calgon - Wikipedia

    en.wikipedia.org/wiki/Calgon

    It gave rise to derivative products which have diverged from the original composition. Today, Calgon water softener contains the active ingredient sodium citrate, [2] and the now discontinued powder used zeolite and polycarboxylate, all of which are less problematic in wastewater treatment than phosphates.