Questions
Which of the following pair of ions makes the water hard ?
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Correct option is B
HCO3- is main reason of temporary hardness of water.Similar Questions
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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