K2CO3 + 2 HCl → 2 KCl + CO2 + H2O – Balanced equation

Or you want a quick look:

This is an acid-base reaction (neutralization): K2CO3 is a base, HCl is an acid.

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

Reactants:

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  • K2CO3Potassium carbonate
    • Other names: Carbonate of potash , Dipotassium carbonate , Sub-carbonate of potash
    • Appearance: White, hygroscopic solid ; Colourless hygroscopic crystals or hygroscopic white powder
  • HClChlorane , Hydrogen chloride
    • Other names: Hydrochloric acid , M , Uriatic acid
    • 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.]

Products:

  • KCl
    • Names: Potassium chloride , Sylvite , Muriate of potash
    • Appearance: White crystalline solid ; 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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