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2. How to remove hard water deposits from your faucets and shower

   www.aol.com/remove-hard-water-deposits-faucets...

   Calcium and magnesium are the main culprits when it comes to creating hard water. And in the U.S., it's almost impossible to avoid it, as hard water is present across 85 percent of the country ...

3. Calcium Lime Rust - Wikipedia

   en.wikipedia.org/wiki/Calcium_Lime_Rust

   Calcium deposits, primarily composed of calcium carbonate (CaCO 3), react with weak acids to form calcium salts that are soluble in water. The general reaction can be represented as follows: CaCO 3 + 2H + → Ca 2+ + CO 2 + H 2 O. Here, H + represents the hydrogen ions provided by the acid

4. Lime softening - Wikipedia

   en.wikipedia.org/wiki/Lime_softening

   Lime softening produces large volumes of a mixture of calcium carbonate and magnesium hydroxide in a very finely divided white precipitate which may also contain some organic matter flocculated out of the raw water. Processing or disposal of this sludge material may be an additional cost to the process. Drying and re-calcining the waste allows ...

5. Stain removal - Wikipedia

   en.wikipedia.org/wiki/Stain_removal

   This can be used for pet stains and out of doors. [3] There is no chief underlying chemical reason why club soda would be superior to plain water in stain removal. [8] Glycerine This can be used to soften "set" stains, especially on wool and non-water-washable fabrics. [3] Boiling water This can be used to take out fruit juice stains.

6. Cleaning agent - Wikipedia

   en.wikipedia.org/wiki/Cleaning_agent

   Toilet bowl cleaning often is aimed at removal of calcium carbonate deposits, which are attacked by acids. Powdered cleaners contain acids that come in the form of solid salts, such as sodium hydrogen sulfate. Liquid toilet bowl cleaners contain other acids, typically dilute hydrochloric, phosphoric, or formic acids. These convert the calcium ...

7. Concrete degradation - Wikipedia

   en.wikipedia.org/wiki/Concrete_degradation

   The sight of calthemite is a visual sign that calcium is being leached from the concrete structure and the concrete is gradually degrading. [12] [17] In very old concrete where the calcium hydroxide has been leached from the leachate seepage path, the chemistry may revert to that similar to "speleothem" chemistry in limestone cave.

8. This wildly popular grout cleaner has gone viral, and for ...

   www.aol.com/lifestyle/this-wildly-popular-grout...

   "This product worked miracles in our bathroom," wrote one Amazon-ian who shared some incredible "before" and "after" photos. "When we moved in, the grout was a dark gray from years of dirt buildup.

9. Calcium plumbate - Wikipedia

   en.wikipedia.org/wiki/Calcium_plumbate

   [14] [15] Studies also include finding calcium plumbate in soils and further possible bioaccumulation. [16] The demand for lead in all forms is decreasing worldwide, [ 17 ] though the use of calcium plumbate and other heavy metal compounds in cement and concrete is subject to recent research and the specific toxicology studied.