CaSO₄ + H₂O → CaO + H₂SO₄

Reactants:

• CaSO₄
  • Names: Calcium sulfate , Plaster of Paris , Drierite ... show moreGypsum , Calcium sulfate (anhydrous) , Anhydrous calcium sulfate , Anhydrous gypsum , Anhydrous sulfate of lime , Calcium salt of sulfuric acid , CaSO4 , Calcium sulphate , Calcium sulfate anhydrous , Sulfuric acid, calcium salt (1:1) , [Note: Gypsum is the dihydrate form and Plaster of Paris is the hemihydrate form.] show less
  • Appearance: White solid ; White hygroscopic powder or crystalline powder ; Odorless, white powder or colorless, crystalline solid. [Note: May have blue, gray, or reddish tinge.]
• H₂O – Water, oxidane
  • Other names: Water (H2O) , Hydrogen hydroxide (HH or HOH) , Hydrogen oxide ... show moreDihydrogen monoxide (DHMO) (systematic name) , Hydrogen monoxide , Dihydrogen oxide , Hydric acid , Hydrohydroxic acid , Hydroxic acid , Hydrol , Μ-oxido dihydrogen , Κ1-hydroxyl hydrogen(0) show less
  • Appearance: White crystalline solid, almost colorless liquid with a hint of blue, colorless gas

Products:

• CaO – Calcium oxide
  • Other names: Quicklime , Burnt lime , Unslaked lime ... show morePebble lime , Calcia , Caustic lime , Calx , Calcium monoxide , Limestone , Burned lime , Lime , Quick lime show less
  • Appearance: White to pale yellow/brown powder ; White hygroscopic crystalline powder ; White or gray, odorless lumps or granular powder.
• H₂SO₄ – Sulfuric acid
  • Other names: Oil of vitriol , Sulfuric acid, concentrated (> 51% and < 100%) , H2SO4 ... show moreSulphuric acid , Battery acid , Hydrogen sulfate , [SO2(OH)2] , [S(OH)2O2] , Sulfuric acid (aqueous) show less
  • 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.]