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Why do we wash with sodium bicarbonate? What gas evolves when washing with sodium bicarbonate?

Why do we wash with sodium bicarbonate? What gas evolves when washing with sodium bicarbonate?

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Answer #1

Sodium bicarbonate (NaHCO3) is base. It can be used to wash to remove any acidic impurities. Since it is base , reaction with acid impurites easier one to happen. If any organic layers ( compounds or liquids) contains acid impurities ( preferely weak acid or dilute acids), you can was with satuated NaHCO3 solution to getrid of acid impurites.

Reaction of NaHCO3 with any acid to produce a salt and CO2

CH3COOH + NaHCO3 → CH3COONa + CO2 + H2O

carbon dioxide(CO2) gas evolves when washing( reacting) with sodium bicarbonate

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