Question

Write the chemical equations of the reactions involved in solvay process of preparation of sodium carbonate.

Answer 1

CaCO₃(s) \(\overset{heat}{\longrightarrow}\) CaO + CO₂

NH₃ + H₂O → NH₄⁺ + OH^-

Na⁺ + Cl^- + NH₄⁺ + OH^- + CO₂ → Na⁺ + HCO₃^- + NH₄⁺ + Cl^-

Na+ + HCO₃ → NaHCO₃ (as precipitate)

NH₄⁺ + Cl^- → NH₄Cl (in soluble)

2NaHCO₃ \(\overset{heat}{\longrightarrow}\) Na₂CO₃ + H₂O + CO₂

2NaCO₃ + 10H₂O → Na₂CO₃.10H₂O