CuSO₄ + 2 NH₄OH → H₂SO₄ + [Cu(NH₃)₂](OH)₂

This is a complexation reaction: [Cu(NH₃)₂](OH)₂ is the formed complex.

Reactants:

• 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
• NH₄OH
  • Names: Ammonium hydroxide , Ammonia solution , Ammonium hydroxide (10%-35% solution) ... show moreAmmonia , Household ammonia , Ammonia water , Ammonia liquor , Aqueous ammonia , E527 , NH4OH , Ammonia aqueous , Aqua ammonia , Ammonium hydrate , Ammonia aqueous solution (10-35%) show less
  • Appearance: Colourless liquid ; Very volatile colourless ammonia solution in water with pungent odour

Products:

• 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.]
• [Cu(NH₃)₂](OH)₂