KOH + H2SO4 = K2SO4 + H2O
2KOH+H₂SO₄²⁻=K₂SO₄²⁻+H₂O 2K+2OH⁻+2H+2SO₄²⁻=2K+2SO₄²⁻+H₂O 2OH+2H=2H₂O OH+H=H₂O