Ba(OH)2 + CO2 → BaCO3 + H2O – Balanced equation

Or you want a quick look:

This is an acid-base reaction (neutralization): Ba(OH)2 is a base, CO2 is an acid.


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  • Ba(OH)2
    • Names: Barium hydroxide , Caustic baryta , Barium hydroxide lime , Ba(OH)2
    • Appearance: White solid
  • 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.]


  • BaCO3
    • Names: Barium carbonate , Witherite , Carbonic acid, barium salt (1:1)
    • Appearance: White crystals ; White crystalline powder
  • 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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