Which substance is not required in the Solvay | vedclass

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(A) The Solvay process is used for the industrial production of sodium carbonate $(Na_2CO_3)$.The raw materials required for this process are ammonia

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$SO_2$

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(A) The Solvay process is used for the industrial production of sodium carbonate $(Na_2CO_3)$.The raw materials required for this process are ammonia $(NH_3)$,carbon dioxide $(CO_2)$,and sodium chloride $(NaCl)$.The chemical reactions involved are:$2NH_3 + H_2O + CO_2 \rightarrow (NH_4)_2CO_3$$(NH_4)_2CO_3 + H_2O + CO_2 \rightarrow 2NH_4HCO_3$$NH_4HCO_3 + NaCl \rightarrow NaHCO_3 + NH_4Cl$$2NaHCO_3 \rightarrow Na_2CO_3 + H_2O + CO_2$Sulfur dioxide $(SO_2)$ is not used in this process.

Which substance is not required in the Solvay process?

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