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The reaction involved during the removal of temporary hardness of water is
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Correct option is A
The temporary hardness of water is due to the presence of bicarbonates of Ca & Mg .i.e,. Mg[HCo3]2Ca[HCo2]3Temporary hardness of water is removed by boiling, during this process the soluble bicarbonates converting into insoluble carbonates. The insoluble precipiate is removesd by filterration.Options 3,4 are equations related to removal of permanent hardness of water.
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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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