2 HCl + Ca(OH)2 → CaCl2 + 2 H2O – Balanced equation

Or you want a quick look:

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


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  • 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.]
  • Ca(OH)2Calcium hydroxide
    • Other names: {{ubl , Slaked lime , Calcium hydrate
    • Appearance: White powder ; Colourless crystals or white powder ; White, odorless powder. [Note: Readily absorbs CO2 from the air to form calcium carbonate.]


  • CaCl2Calcium chloride
    • Other names: Calcium(II) chloride , Calcium dichloride , E509
    • Appearance: White powder, hygroscopic ; Odourless hygroscopic colourless or white crystals
  • 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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