1)Hard water isnot good for laundries.
2)Cold water of the same source hardly forms lather with soap.
Give scientific reason.
Answers
1.You will have better cleaning results with a liquid laundry detergent because all brands contain nonionic surfactants that are resistant to water hardness. Because there is no ionic charge, the product will not precipitate out and cause a scum on fabrics. ... Unfortunately, soap does not perform well in hard water.
2.It is made up when alkali reacts with fatty acids. hardness of water is due to calcium and magnesium ions. when soap is added to hard water, calcium and magnesium ions replaces sodium (or potassium) ions in the salt (soap) and gets precipitated hence lather formation is hindered.
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1) high levels of calcium and magnesium are found in hard water - these minerals attach to fibers of the fabric causing a stiff feeling and may leave a residue on your clothes - for excessively hard water these minerals can actually break the fibers causing holes in your clothing. ·
2)Soap will lather less or perhaps not lather at all in hard water, which is water that contains dissolved minerals such as calcium and magnesium. Soft water does not contain a measurable amount of minerals and will produce a better lather. An automatic water softener can be installed on water supply pipes for home use. Automatic water softeners act to remove minerals from water and replace them with sodium, which does allow soap to lather.
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