Question

The amino acid, lysine, has three titratable groups with pKa values of 2.16, 9.06, and 10.54. Sketch the titration curve that would result if the completely deprotonated form of this amino acid was titrated with the HCl. Label all the components of the titration curve.

Answer 1

Before starting to titrate Lysine K, this titration are going to be done crushioning its ions and conuter-ions to make more simple the curve.

.The relationship among pH and pK is the Henderson Hanselbach ecuation applied to calculate pH from pK.

In the equivalent points, [protonated specie]=[unprotonated specie] and pH=pK_a

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The [HCl] concentration of the graphic is the one from titrated solution and the pH is from the titrated solution