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Question

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


Solution

$$CaCO_3\overset{heat}{\rightarrow}CaO+CO_2$$
$$NH_3+H_2 O \rightarrow NH_4^++OH^-$$
$$Na^++Cl^-+ NH_4^++OH^-+CO_2\rightarrow Na^+ +HCO_C^-+NH_4^+ +Cl^-$$
$$Na^++HCO_3\rightarrow NaHCO_3$$(as precipitate)
$$NH_4^++Cl^-\rightarrow NH_4Cl$$ (in solution)
$$2NaHCO_3\overset{heat}{\rightarrow}Na_2CO_3+H_2O+CO_2$$
$$2NaCO_3+10H_2O \rightarrow Na_2CO_3.10H_2O$$

Chemistry

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