Which of the following equations represents the reaction leading to the removal of permanent hardness of water?
a
Ca(HCO 3)2 → CaCO3 + H2O + CO2
b
MgSO4 + Na 2CO3 + Na 2SO
c
Ca(OH) 2 + 2HCI → CaCI 2 + 2H 2O
d
Ca(HCO3)2 + Ca(OH)3 → 2CaCO3 + 2H2O
e
MgSO4 + BaCI2 → MgCI2 + BaSO4
Explanation
Correct Option
bNo explanation available
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Favourivie
2 years ago
Ca(HCO3)2 + Ca(OH)2 → 2CaCO3 + 2H2O. Calgon reacts with hard water and precipitates with salts, which is easier to remove from water. The unwanted ions in hard water are exchanged with more agreeable ions like sodium ions.
Option D is correct
