1.

The molecular formula of a commercial resin used for exchanging ions in water softeningis C_(8) H_(7) SO_(3) (mol . wt. = 206) . Whatwouldbe the maximumuptake of Ca^(2+) ionsby the resin whenexpressed in mole per gram resin ?

Answer»

`(1)/(103)`
`(1)/(206)`
`(1)/(309)`
`(1)/(412`

Solution :`2 C_(8) H_(7) SO_(2)Na + Ca^(2+) to (C_(8) H_(7) SO_(3))_(2) Ca + 2Na`


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