2 HNO3 + Na2CO3 → 2 NaNO3 + CO2 + H2O – Balanced equation

Or you want a quick look:

This is an acid-base reaction (neutralization): HNO3 is an acid, Na2CO3 is a base.

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


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  • HNO3Nitric acid
    • Other names: Aqua fortis , Spirit of niter , Eau forte
    • 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.]
  • Na2CO3Sodium carbonate
    • Other names: Soda ash , Washing soda , Soda crystals
    • Appearance: White solid, hygroscopic ; White hygroscopic powder


  • NaNO3Sodium nitrate
    • Other names: Peru saltpeter , Soda niter , Cubic niter
    • Appearance: White powder or colorless crystals ; Colourless hygroscopic crystals
  • CO2
    • Names: Carbon dioxide , {{plainlist| , CO2
    • 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.]
  • H2OWater, oxidane
    • Other names: Water (H2O) , Hydrogen hydroxide (HH or HOH) , Hydrogen oxide
    • Appearance: White crystalline solid, almost colorless liquid with a hint of blue, colorless gas
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