CHM135H1 Lecture Notes - Lecture 20: Conjugate Acid, Lone Pair, Acid Strength

• School: UTSG
• Department: Chemistry
• Course: CHM135H1
• Professor: Gilbert Walker, Eugenia Kumacheva, Kristine Quinlan

Document Summary

Chm135: lecture 19 acid base equilibria (part 1/3) October 22, 2018 (relevant reading: chemistry 2nd ed. The earliest acid-base definition, classifies acids and bases in terms of their behavior in water. An acid is a substance with h in its formula that dissociates to yield h+ (h3o+: ha(aq) h+ (aq) + a- (aq) A base is a substance with oh in its formula that dissociates to yield oh: moh(aq) m+ (aq) + oh- (aq) When an acid reacts with a base, neutralization happens: h+ (aq) + oh- Restricted to aqueous solutions; doesn"t account for basicity of substances like nh3 (aq) h2o(l) An acid is a proton donor, i. e. , any species that donates an h+ ion: an acid must contain h in its formula. A base is a proton acceptor, any species that accepts an h+ ion: a base must contain a lone pair of electrons to bond to h+