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Calculate the weight of CaO required to ...

Calculate the weight of `CaO` required to remove hardness of `10^(6) L` of water containing `1.62 g` of `Ca (HCO_(3))_(2)` in `1.0 L`.
`(Mw of Ca (HCO_(3))_(2) = 162, mw of CaO = 56)`

Text Solution

Verified by Experts

Mass of `Ca(HCO_(3))_(2)` in the water
`=1.62xx1000000`
`=1620000g=1620kg`
Reaction involved in the removal of hardness may be given as,
`underset(162kg)(Ca(HCO_(3))_(2))+underset(56kg)(CaO) to 2CaCO_(3)+H_(2)O`
`therefore 162kg Ca(HCO_(3))_(2) "requires" 56kg CaO`
`therefore 1620"kg Ca"(HCO_(3))_(2) "will requires " 560kg CaO`
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