HCl (aq) + NaHCO₃ (aq) → H₂O (l) + CO₂ (g) + NaCl (aq)

This is an acid-base reaction (neutralization): HCl is an acid, NaHCO₃ is a base.

This is a gas evolution reaction, CO₂ is the formed gas.

Reactants:

• HCl – Chlorane , Hydrogen chloride
  • Other names: Hydrochloric acid , M , Uriatic acid ... show moreHydronium chloride , Chlorhydric Acid , Hydrochloric acid gas , HCl , Anhydrous hydrogen chloride , Hydrochloric acid, anhydrous , Aqueous hydrogen chloride , [Note: Often used in an aqueous solution.] show less
  • Appearance: Colorless, transparent liquid, fumes in air if concentrated ; Colorless gas ; Colourless compressed liquefied gas with pungent odour ; Colorless to slightly yellow gas with a pungent, irritating odor. [Note: Shipped as a liquefied compressed gas.]
• 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

Products:

• 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
• 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.]
• NaCl – Sodium chloride
  • Other names: {{unbulleted list , Salt , Table salt ... show moreCommon salt , NaCl , Broncho saline show less
  • Appearance: Colorless cubic crystals