CuO + SO₃ → CuSO₄

This is an acid-base reaction (neutralization): CuO is a base, SO₃ is an acid.

Reactants:

• CuO – Copper(II) oxide
  • Other names: Cupric oxide , Copper monoxide , Copper oxide ... show moreCu(II) oxide , Cuprum oxydatum nigrum , Cuprous Oxide show less
  • Appearance: Black to brown powder
• SO₃ – Sulfur trioxide , Sulfonylideneoxidane
  • Other names: Sulfuric anhydride , Sulfur(VI) oxide , SO3 ... show moreSulphur trioxide , [SO3] , Sulphuric (acid) anhydride , Sulfuric oxide show less
  • Appearance: Colorless to white crystalline solid which will fume in air.{{ ; Fuming hygroscopic colourless liquid or colourless-to-white crystals

Products:

• CuSO₄ – Copper(II) sulfate
  • Other names: Cupric sulphate , Blue vitriol (pentahydrate) , Bluestone (pentahydrate) ... show moreBonattite (trihydrate mineral) , Boothite (heptahydrate mineral) , Chalcanthite (pentahydrate mineral) , Chalcocyanite (mineral) , Cupric sulfate , Copper sulfate (anhydrous) , CuSO4 , Copper sulfate , Cupric sulfate anhydrous , Copper monosulphate , Copper sulfate (1:1) , Cupric sulphate anhydrous , Copper sulphate , Copper(2+) sulfate , Copper(II) sulphate , Copper monosulfate , Cupric sulfate, anhydrous , Cupric sulphate, anhydrous , Sulfuric acid, copper(2+) salt(1:1) show less
  • Appearance: Gray-white (anhydrous) | blue (pentahydrate) ; White hygroscopic crystals