ENCH 213 Lecture Notes - Titration Curve, Titration, Equivalence Point
25 Nov 2013
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Acid-base titrations strong with strong: weak with strong, kjeldahl method titration of mixtures titration of polyprotic species. Titrant standard acid or base: strong, stable, without possibility of side reactions acid. When co2 goes into water: forms carbonic acid which reacts with base. Why people but beaker on top of burette w/ bit of space. Initial point: [h3o+] = ca (formality of acid, if ca > 10-6 m otherwise have to take into autroprotolysis of, k= 1/kw =1. 0 1014 water, ph = -log ca. Titration of strong acid by strong base (continued: when vb < ve: excess h3o+ ph < 7, [h3o+] = # of moles acid # molesbase total volume of solution = Titration of strong acid by strong base (continued: when vb > ve. V a v b: excess oh- ph > 7. [h3o+]= kw/[oh-]= 10-14/[oh-] equivalence point: where the slope of the titration curve is the greatest, where the second derivative=0.
