NaHCO₃ (aq) + HNO₃ (aq) → NaNO₃ (aq) + CO₂ (g) + H₂O (l)

This is an acid-base reaction (neutralization): NaHCO₃ is a base, HNO₃ is an acid.

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

Reactants:

• 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
• HNO₃ – Nitric acid
  • Other names: Aqua fortis , Spirit of niter , Eau forte ... show moreHydrogen nitrate , Acidum nitricum , Nitric acid (> 70% in water) , Fuming nitric acid , Engravers acid , HONO2 , Red fuming nitric acid , RFNA , White fuming nitric acid (WFNA) show less
  • Appearance: Colorless, yellow or red fuming liquid ; Colourless-to-yellow liquid with pungent odour ; Colorless, yellow, or red, fuming liquid with an acrid, suffocating odor. [Note: Often used in an aqueous solution. Fuming nitric acid is concentrated nitric acid that contains dissolved nitrogen dioxide.]

Products:

• NaNO₃ – Sodium nitrate
  • Other names: Peru saltpeter , Soda niter , Cubic niter ... show moreNitric acid sodium salt (1:1) , Sodium saltpeter , Nitric acid, sodium salt , Nitrate of soda , Nitric acid monosodium salt , Sodium(I) nitrate (1:1) , Niter , Chile saltpeter show less
  • Appearance: White powder or colorless crystals ; Colourless hygroscopic crystals
• 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