This is an acid-base reaction (neutralization): Fe(OH)3 is a base, H2SO4 is an acid.
Reactants:
Fe(OH)3
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.]
Products:
Fe2(SO4)3 – Iron(III) sulfate
Other names: Ferric sulfate, Sulfuric acid, Iron(3+) salt (3:2)Diiron tris(sulphate), Iron tersulfate, Iron sesquisulfate, Iron persulfate, Ferric tersulfate, Ferric sesquisulfate, Ferric persulfate, Diiron trisulfate, Iron(III) sulfate(VI), Ferric sulfate anhydrous
Appearance: Grayish-white crystals
H2O – Water, oxidane
Other names: Water (H2O), Hydrogen hydroxide (HH or HOH), Hydrogen oxideDihydrogen monoxide (DHMO) (systematic name), Hydrogen monoxide, Dihydrogen oxide, Hydric acid, Hydrohydroxic acid, Hydroxic acid, Hydrol, Μ-oxido dihydrogen, Κ1-hydroxyl hydrogen(0)
Appearance: White crystalline solid, almost colorless liquid with a hint of blue, colorless gas