What mass of CaO will be required to remove the hardness of 1000 litres of water containing 1.62g of Ca(HCO_3)_2 per litre?

What mass of CaO will be required to remove the hardness of 1000 litre

1.	What mass of CaO will be required to remove the hardness of 1000 litres of water containing 1.62g of Ca(HCO_3)_2 per litre?
Answer» Solution :`underset("162 g")(Ca(HCO_(3))_(2))+underset("56g")(CaO) to 2CaCO_(3)+H_(2)O+CO_(2)` `5.6 xx 10^(2)g" be CAUSE solution has 1620 g"Ca(HCO_(3))_(2)`.