Define the an acid/base according to the Bronsted-Lowry and Lewis theories. Support with equation to illustrate an acid-base reaction for each theory, identifying them clearly. Also state the bond type formed in an Lewis acid-base reaction.

Bronsted-Lowry theory: Acid is a proton donor (H⁺) and base is a proton acceptor, i.e NH₃(aq) + H₂O (l) ⇌ NH₄⁺ (aq) + OH^-(aq) (In the left hand side, the H₂O is donating a proton thus is the acid, and the NH₃ receives a proton thus is the base)Lewis theory: Acid is an electron pair acceptor (electrophile) and a base is an electron pair donor (nucleophile), i.e SO₃(g) + H₂O (l) ⇌ H₂SO₄ (aq) (in the left side, the SO₃ acts a lewis acid by accepting an electron pair and H₂O acts as a lewis base by donating a pair of electrons)More specifically the bond formed is a coordinated covalent bond, as the e^- pair shared amongst the two species (between the Oxygen atom and the sulfur atom).