Write in details about hard water
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Hard water is water that has high mineral content (in contrast with "soft water"). Hard water is formed when water percolates through deposits of limestone and chalk which are largely made up of calcium and magnesium carbonates and bicarbonates.
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Hard water do not give lather when soap is added to it...
Hardness of water can be removed by boiling it...
Alumino silicates called zeolites are also used...
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