This is an acid-base reaction (neutralization): H2SO4 is an acid, NaOH is a base.
Reactants:
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.]
KMnO4 – Potassium manganate(VII)
Other names: Potassium permanganate, Chameleon mineral, Condy's crystalsPermanganate of potash Hypermangan, Permanganic acid potassium salt
Appearance: Purplish-bronze-gray needles | magenta–rose in solution ; Dark purple crystals
Appearance: White, waxy, opaque crystals ; White hygroscopic solid in various forms ; Colorless to white, odorless solid (flakes, beads, granular form).
Appearance: White solid, deliquescent ; White hygroscopic solid in various forms ; Odorless, white or slightly yellow lumps, rods, flakes, sticks, or pellets. [Note: May be used as an aqueous solution.]
Na2SO4
Names: Sodium sulfate, Sodium sulphate, Sulfate of sodiumThenardite (mineral), Glauber's salt (decahydrate), Sal mirabilis (decahydrate), Mirabilite (decahydrate mineral), Disodium sulfate, Anhydrous sodium sulfate, Sodium sulfate anhydrous, Sodium sulfate, anhydrous, Sodium sulphate anhydrous, Sodium sulphate, anhydrous, Sulfuric acid disodium salt, anhydrous, Disodium sulphate, Salt cake, Na2SO4, Sulfuric acid disodium salt
Appearance: White crystalline solid | hygroscopic ; White hygroscopic solid in various forms