CaO + H2SO4 → CaSO4 + H2O – Balanced equation

Or you want a quick look:

This is an acid-base reaction (neutralization): CaO is a base, H2SO4 is an acid.

Reactants:

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  • CaOCalcium oxide
    • Other names: Quicklime , Burnt lime , Unslaked lime
    • Appearance: White to pale yellow/brown powder ; White hygroscopic crystalline powder ; White or gray, odorless lumps or granular powder.
  • 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.]

Products:

  • CaSO4
    • Names: Calcium sulfate , Plaster of Paris , Drierite
    • Appearance: White solid ; White hygroscopic powder or crystalline powder ; Odorless, white powder or colorless, crystalline solid. [Note: May have blue, gray, or reddish tinge.]
  • 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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