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Temporary hardness may be removed from water by adding
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Correct option is B
CaHCO32 + CaOH2 → 2CaCO3ppt. ↓ + 4H2O
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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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