How does Daltons atomic theory account for the law of constant composition

Buffers • Def: is a solution of a weak acid (HA) and its conjugate base (A-) o Equal amount of both solutes • Adding acid o Reacts with the conjugate base § CH3COO- + H3O+ > CH3COOH + H2O • Adding base o Reacts with the weak acid § CH3COOH + OH- > CH3COO- + H2O pH of a Buffer • weak acid + H2O <> H3O+ + conjugate base o Ka = [H3O+][conjugate base]/[weak acid] • -log(Ka) = -log([H3O+]) - log([conjugate base]/[weak acid]) o pKa = pH – log([base]/[acid]) • increased base > increased pH • scenario with increase of OH- ions o initial: [Ha] = [A-] o after OH- is added: [HA] < [A-] • scenario with increase o