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hardness is removed by Clark's method....

______ hardness is removed by Clark's method.

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Temporary
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What is the use of Clark's method?

A sample of tap water contains 366 ppm of HCO_(3)^(-) ions with Ca^(2+) ion. Now Ca^(2+) removed by Clark's method by addition of Ca(OH)_2 . Then what minimum mass of Ca(OH)_2 will be required to remove HCO_(3)^(-) ions completely from 500 g of same tap water

Total number of methods which can remove permanent hardness of water: (a) Clark's method , (b) Ion-exchange method (c) synthetic resin method (d) Calgon method (e) treatment with sodium carbonate

Both temporary and permanent hardness is removed on boiling with