Below is a summary of chemical reactions that occur in lime-soda softening. Unit Operation To add Chemical reaction Equa

[answerhappygod]

Below Is A Summary Of Chemical Reactions That Occur In Lime Soda Softening Unit Operation To Add Chemical Reaction Equa 1 (85.29 KiB) Viewed 38 times

Below is a summary of chemical reactions that occur in lime-soda softening. Unit Operation To add Chemical reaction Equation SI Remove CO₂ Lime CO₂+ Ca(OH)2 → CaCO3+H₂O Remove Ca Lime Ca²+ + 2HCO + Ca(OH)2 → 2CaCO3 + 2H₂O S2 carbonate hardness Remove Mg Lime S3 carbonate hardness Mg + 2HCOy + 2Ca(OH)2 → 2CaCO₁+Mg(OH)₂ + 2H₂O Ca²+SO+NagCO3 Remove Ca non- Soda CaCO3+2Na+ + S4 carbonate hardness SO Remove Mg non- Lime Mg + SO² + Ca(OH)2 → S5a carbonate hardness Mg(OH)₂+Ca²+ SO4²- Soda Ca²+ + SO₂-NaCO3 → CaCO34+ 2Na+ + S5b SO Recarbonation CO₂ Ca²+2C0+ 2OH- Ca²+ + 2HCO S6 How much lime (mg/L as CaCO3) is required to remove 50 mg/L (as CaCO3) magnesium carbonate hardness? O100 197 50