Which of the following equations represents..

Question 1 Report

Which of the following equations represents the reaction leading to the removal of permanent hardness of water?

Ca(HCO ₃)₂ → CaCO₃ + H₂O + CO₂

MgSO₄ + Na ₂CO₃ + Na ₂SO

Ca(OH) ₂ + 2HCI → CaCI ₂ + 2H ₂O

Ca(HCO₃)₂ + Ca(OH)₃ → 2CaCO₃ + 2H₂O

MgSO₄ + BaCI₂ → MgCI₂ + BaSO₄