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Question
Describe how sodium hydrogencarbonate (baking soda) is produced on a large scale. Write equation of the reaction involved.
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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RELATED QUESTIONS
A student takes about 2 mL ethanoic acid in a dry test tube and adds a pinch of sodium hydrogen carbonate to it. He reports the following observations:
I. Immediately a colourless and odourless gas evolves with a brisk effervescence.
II. The gas turns lime water milky when passed through it.
III. The gas burns with an explosion when a burning splinter is brought near it.
IV. The gas extinguishes the burning splinter that is brought near it.
The correct observations are
(A) I, II and III
(B) II, III and IV
(C) III, IV and I
(D) I, II and IV
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