This is an acid-base reaction (neutralization): Al2O3 is a base, H2SO4 is an acid.
Reactants:
Al2O3
Names: Aluminium oxide (Aluminum oxide), Aluminum oxide, Aluminium oxideAlpha-Alumina, Alumina, Aluminum trioxide, Alpha-Aluminum oxide, Abramant, Abramax, Abrarex, Abrasit, Alcoa F 1, Almite, Alon C, Aloxite, Cab-O-grip, Catapal S, Compalox, Conopal, Diadur, Dialuminum trioxide, Dispal alumina, Dispal M, Dural, Dotment 324, Dotment 358, Exolon XW 60, Faserton, Fasertonerde, Hypalox II, Jubenon R, Ketjen B, Lucalox, Martoxin, Poraminar, Aluminum oxide [a-Alumina], Aluminum trioxide [a-Alumina], [Note: α-Alumina is the main component of technical grade alumina. Corundum is natural Al2O3. Emery is an impure crystalline variety of Al2O3.]
Appearance: White solid ; White powder ; White, odorless, crystalline powder.
H2SO4 – Sulfuric acid
Other names: Oil of vitriol, Sulfuric acid, concentrated (> 51% and < 100%), H2SO4Sulphuric acid, Battery acid, Hydrogen sulfate, [SO2(OH)2], [S(OH)2O2], Sulfuric acid (aqueous)
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.]