Ba(OH)2 + H2SO4 → BaSO4 + 2 H2O – Balanced equation

Or you want a quick look:

This is an acid-base reaction (neutralization): Ba(OH)2 is a base, H2SO4 is an acid.

This is a precipitation reaction: BaSO4 is the formed precipitate.


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  • Ba(OH)2
    • Names: Barium hydroxide , Caustic baryta , Barium hydroxide lime , Ba(OH)2
    • Appearance: White solid
  • H2SO4Sulfuric acid
    • Other names: Oil of vitriol , Sulfuric acid, concentrated (> 51% and , H2SO4
    • Appearance: Clear, colorless liquid ; Odourless colourless oily hygroscopic liquid ; Colorless to dark-brown, oily, odorless liquid. [Note: Pure compound is a solid below 51°F. Often used in an aqueous solution.]


  • BaSO4
    • Names: Barium sulfate , Artificial barite , Barite
    • Appearance: White crystalline ; Odourless tasteless white or yellowish crystals or powder ; White or yellowish, odorless 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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