Question

Calculate the amount
10000 lits
lime required for softuning 1000 l
of water Containing Ca(HCO3)2 =25ppm, mg CHCoy); = 144 ppm
cach, - po, mgalz = 95ppm​

Answer 1

Answer:

$We can calculate the hardness of given water sample as:</p><p>(i) Ca(HCO </p><p>3</p><p> </p><p> ) </p><p>2</p><p> </p><p> CaCO3≡CaCO </p><p>3</p><p> </p><p>$

$162ppm≡100ppm </p><p>∴81ppm≡50ppm</p><p></p><p>(ii) Mg(HCO </p><p>3</p><p> </p><p> ) </p><p>2</p><p> </p><p> ≡CaCO </p><p>3</p><p> </p><p> </p><p>146 ppm ≡ 100 ppm </p><p>∴73ppm≡50ppm$

$</p><p>(ii) Mg(HCO </p><p>3</p><p> </p><p> ) </p><p>2</p><p> </p><p> ≡CaCO </p><p>3</p><p> </p><p> </p><p>146 ppm ≡ 100 ppm </p><p>∴73ppm≡50ppm$

$(iii) CaSO </p><p>4</p><p> </p><p> ≡CaCO </p><p>3</p><p> </p><p> </p><p>136ppm≡100ppm</p><p>∴68ppm≡50ppm </p><p>$

$</p><p>(iv) MgSO </p><p>4</p><p> </p><p> ≡CaCO </p><p>3</p><p> </p><p> </p><p>120ppm≡100ppm</p><p>∴60ppm≡50ppm</p><p> Total degree of hardness of water =50×4=200ppm$