what is meant by hardness of water
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The simple definition of water hardness is the amount of dissolved calcium and magnesium in the water. Hard water is high in dissolved minerals, both calcium and magnesium. ... When hard water is heated, such as in a home waterheater, solid deposits of calcium carbonate can form.
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The water by which we cannot make lather with soap shows hardness of water. it can be removed by adding sodium bicarbonate
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