A sample of hard water contains 122 p p m of `HCO_(3)^(ɵ)` ions,. What is the minimum weight of `CaO` required to remove ions completely from `1 kg` of such water sample?

10^5 g of a sample of water contained 16.2 g of Ca(HCO_3)_2 its hardness is

10^(5)g of a sample of water contained 16.2 8 of Ca(HCO_(3))_(2) Its hardness is

A sample of hard water contains 20 mg of Ca^(2+) ions per litre. How many milliequivalents of Na_(2)CO_(3) would be required to soften 1 litre of sample ?

Degree of hardness of a water sample is 100ppm. If that sample contains hardness causing salt Mg(HCO_3)_2 , calculate weight of Ca(OH)_2 required for the treatment of 10kg of water sample.

A sample of hard water contains 0.05mol of CaC1_(2) , per litre, What is the minimum concentration of Na_(2)SO_(4) , which must be added for removing Ca^(2+) ions from this water sample? K_(sp) for CaSO_(4) is 2.4 xx 10^(-5) at 25^(@)C .

A sample of hard water contains 0.05mol of CaC1_(2) , per litre, What is the minimum concentration of Na_(2)SO_(4) , which must be added for removing Ca^(2+) ions from this water sample? K_(sp) for CaSO_(4) is 2.4 xx 10^(-5) at 25^(@)C .

A sample of hard water contasins 0.005 mole of CaCI_(2) per liter. What is the minimum concentration of Na_(2)SO_(4) which must be added for removing Ca^(2+) ions from this water sample ? (K_(SP)for CaSO_(4)=2.4xx10^(-5) at 25^(@)C)