Explain with equation, what is noticed when permanent hard water is treated with
(a) slaked lime
(b) washing soda
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State the disadvantages of using hard water.
Why does the hardness of water render it unfit for use in a
(i) boiler
(ii) for washing purposes?
What is permutit method, how can it be used for softening hard water ?
Explain, with equations, why ordinary soap does not lather easily in hard water.