Chemistry 1027A/B Lecture Notes - Lone Pair, Organic Compound, Orbital Hybridisation

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Organic chemistry key concepts: acids & bases (usselman version) An acid is a proton donor: ha (acid) A base is a proton receptor: b: (base) + h+ (proton) Every acid-base reaction must have both an acid (to supply a proton) and a base (to accept the proton). Organic compounds act as weak acids and bases. For a general weak acid ha: equilibrium position. Ha + h2o h3o+ (aq) + a- (aq) *the long arrow shows the. Ka = [h3o+][a-] / [ha] pka = -log ka. Recognize that as organic acids (weak) get stronger, their ka gets larger, and their pka gets smaller. Concentrate on recognizing the structural features that affect acid (and base) strength. It is the pulling of an electron pair by an atom in a covalent bond that introduces reactivity. The stability of a- is a good indicator of acid strength.

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