K2O + CO2 → K2CO3 – Balanced equation

Or you want a quick look:

This is an acid-base reaction (neutralization): K2O is a base, CO2 is an acid.


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  • K2OPotassium oxide , Potassium oxidopotassium
    • Other names: Potash , Dipotassium oxide , Dipotassium monoxide
    • Appearance: Pale yellow solid ; Grey hygroscopic crystalline powder
  • 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.]


  • K2CO3Potassium carbonate
    • Other names: Carbonate of potash , Dipotassium carbonate , Sub-carbonate of potash
    • Appearance: White, hygroscopic solid ; Colourless hygroscopic crystals or hygroscopic white powder
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