a sample of water containing Sodium chloride is more suitable for washing than a sample of water containing calcium chloride.why
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Water can be softened by adding sodium carbonate (washing soda) or by passing the water through an ion-exchange column.
Washing soda
Sodium carbonate, Na2CO3, is also known as washing soda. It can soften water that has temporary hardness and it can soften water that has permanent hardness.
Sodium carbonate is soluble in water and adds a large amount of carbonate ions to the water. These react with dissolved calcium ions, forming a precipitate of calcium carbonate:
Ca2+(aq) + CO32–(aq) → CaCO3(s)
The calcium ions come from the hard water and the carbonate ions from the washing soda.
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sodium has a better action on dirt than calcium chloride and Na is also used in making soaps
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