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