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10L of hard water required 0.56 goflime ...

10L of hard water required 0.56 goflime (CaO) for removing hardness. Hence, temporary hardness in ppm (part per million, 10%) of `CaCO_3` is

A

100

B

200

C

10

D

20

Text Solution

Verified by Experts

The correct Answer is:
B
Temporary hardness is due to `HCO_3^(-)` of `Ca^(2+)` and `Mg^(2+)`
`Ca(HCO_3)_2 + CaO to 2CaCO_3 + H_2O`
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