Questions
Statement-I: Permanent hardness of water is removed by treatment with washing soda.
Statement-II: Washing soda reacts with soluble magnesium and calcium sulphate to form insoluble carbonates.
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Correct option is A
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The molecular formula of a commercial resin used for exchanging ion in water softening is C8H7SO3 Na (mol. wt. = 206). What would be the minimum uptake of Ca2+ ions by the resin when expressed in mole per gram resin ?
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