why are soap not very effective when a fabric is washed in hard water? how is this problem resolved
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Answered by
23
soaps are not suitable for washing clothes when water is hard: Soaps, when used with hard water, does not lather or produce foam easily because of the formation of a curdy precipitate or scum. This scum is created when soaps react with the calcium and magnesium ions present in hard water.
yashikagariya:
how is this problem resolved by adding detergent???
Detergents are less sensitive to the hardness minerals in water; therefore, they perform better and do not form a curd. Because of these features, detergents, instead of soaps, are used for laundry products.
Understood?
yes, thank you
:)
Answered by
15
Hey dear,
● Explaination -
- Hard water contains salts of calcium and magnesium principally as bicarbonates, chlorides, and sulfates.
- These ions displace sodium ion from soap molecules to form insoluble soaps.
Ca2+ + 2Na(stearate)↓ → Ca(stearate)2 + 2Na+
Mg2+ + 2Na(stearate)↓ → Mg(stearate)2 + 2Na+
- Formation of these insoluble soaps thus decreases the cleansing capacity of soaps.
- Therefore, soaps are not very effective when a fabric is washed in hard water.
Hope this helps you.
Keep asking .
● Explaination -
- Hard water contains salts of calcium and magnesium principally as bicarbonates, chlorides, and sulfates.
- These ions displace sodium ion from soap molecules to form insoluble soaps.
Ca2+ + 2Na(stearate)↓ → Ca(stearate)2 + 2Na+
Mg2+ + 2Na(stearate)↓ → Mg(stearate)2 + 2Na+
- Formation of these insoluble soaps thus decreases the cleansing capacity of soaps.
- Therefore, soaps are not very effective when a fabric is washed in hard water.
Hope this helps you.
Keep asking .
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