Describe how sodium hydrogencarbonate (baking soda) is produced on a large scale. Write equation of the reaction involved.

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Solution

Sodium hydrogencarbonate (baking soda) is produced on a large scale by reacting a cold and concentrated solution of sodium chloride called brine with ammonia and carbon dioxide.

NaCl + NH₃ + H₂O + CO₂ → NaHCO₃ + NH₄Cl

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