NSCI 1332 Study Guide - Quiz Guide: Equivalence Point, Acid Dissociation Constant, Chromate And Dichromate
10 Sep 2015
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Experiment 16 determination of dissociation constant of weak acid. Bronsted acid: the strength of an acid depends on its ability to donate protons. Where pk a= log (ka) ph= p k a log [ ha] Determined this by titrating weak acid with a strong base and graph ph vs volume added this showed us the equivalence points. From the graph at the point of the half equivalence point, the value of ph = pka and thus ka can be found and from this, all necessary concentrations. Experiment 17 titration curves of polyprotic acids. Polyprotic acids: acids that have more than 1 proton that can be liberated. Methods to find ph and everything are exactly the same as above by using equivalence point, half equivalence and pka. At the 1st equivalence point (ml acid)(m acid) = (ml base)(m base) Experiment 18 determine the solubility product constant for sparingly soluble salt. In an equilibrium reaction the following reactions take place .
