Na₂O + 2 CO₂ + H₂O → 2 NaHCO₃

This is an acid-base reaction (neutralization): Na₂O is a base, CO₂ is an acid.

Reactants:

• Na₂O – Sodium oxide
  • Other names: Disodium oxide , Sodium monoxide , Disodium monoxide
  • Appearance: White solid ; White lumps or powder
• CO₂
  • Names: Carbon dioxide , {{plainlist| , CO2 ... show moreCarbonic acid gas , Dry ice , [CO2] , Carbonic anhydride , R-744 , E-290 , E 290 , E290 , Carbonic acid anhydride , Carbon-12 dioxide , Methanedione , Carbon oxide , CO₂ , [Note: Normal constituent of air (about 300 ppm)]. show less
  • Appearance: Colorless gas ; Odourless colourless compressed liquefied gas ; Colorless, odorless gas. [Note: Shipped as a liquefied compressed gas. Solid form is utilized as dry ice.]
• H₂O – Water, oxidane
  • Other names: Water (H2O) , Hydrogen hydroxide (HH or HOH) , Hydrogen oxide ... show moreDihydrogen monoxide (DHMO) (systematic name) , Hydrogen monoxide , Dihydrogen oxide , Hydric acid , Hydrohydroxic acid , Hydroxic acid , Hydrol , Μ-oxido dihydrogen , Κ1-hydroxyl hydrogen(0) show less
  • Appearance: White crystalline solid, almost colorless liquid with a hint of blue, colorless gas

Products:

• NaHCO₃ – Sodium hydrogen carbonate
  • Other names: Sodium bicarbonate , Baking soda , Bicarb (laboratory slang) ... show moreBicarbonate of soda , Nahcolite , Sodium Bicarbonate , Monosodium Carbonate , Soda Mint , Baking Soda , Natriumhydrogenkarbonat , Sodium hydrogencarbonate , E-500 , NaHCO3 , E 500 , Sodium acid carbonate , Carbonic acid monosodium salt , E500 , Neut , Citrosodina show less
  • Appearance: White crystals ; White solid in various forms