Acid-Base Chemistry: An acid is a proton (H⁺) donor, with the general formula H-A → H⁺ + A⁻, where H-A is the acid, H⁺ is the proton, and A⁻ is the conjugate base.
A slide from a presentation on acid-base chemistry showing the definition of an acid as a proton (H⁺) donor, with the general formula H-A → H⁺ + A⁻, labeling H-A as acid, H⁺ as proton, and A⁻ as conjugate base.