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How washing soda is produced ? …

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How washing soda is produced ? By step by step equation. And also explain it
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Anmol Preet 4 years, 2 months ago

???? 1 :- Limestone is heated to furnish carbon - dioxide and lime. CaCO3 (s) (by heat) ----> CaO (s) + CO2 (g). ???? 2 :- Carbon dioxide and ammonia gases are bubbled into a saturated solution of sodium chloride (NaCl) at 15°C. NaCl + NH3 + CO2 + H2O ---> NaHCO3 + NH4Cl Sodium Hydrocarbonate (NaHCO3) is sparingly soluble in water at 15°C and is filtered out. ???? 3 :- On heating, NaHCO3 gives sodium carbonate (Na2CO3). 2NaHCO3 (s) (by heat) ---> Na2CO3 (s) + CO2 (g) + H2O (g) Anhydrous sodium carbonate (Na2CO3) thus obtained is called soda ash. Sodium carbonate readily dissolves in water. The solution on evaporation below 32°C gives crystals of sodium carbonate, Decahydrate, i.e., Na2CO3.10H2O.
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