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Experiment 20pH TitrationKy HoangDavid OsoMarch 7, 2016 CHEM 1212KSection J01TA: Baijie PengHonor Pledge – Freshman Chemistry LaboratoriesI did not copy any portion of this work from the work of other students,old lab reports, or unreferenced materials. I understand that such activityis a violation of the Georgia Tech Honor Code.______________________________________Signature
II. Introduction a.In an acid-base titration, the concentration of a basic or acidic solution can be determined by titrating it with a volume of a standard opposite solution of known concentration required to neutralize it. The purpose is to find the equivalence point, thepoint at which the moles of acid equal the moles of base. b.In this experiment, the concentration of phosphoric acid in commercial cola was determined using an acid-base titration. Weak acids are only partially ionized in aqueous solution, so the phosphoric acid in water equation looks like the following dynamic equilibrium equation:−¿(aq)−¿(aq)+O H¿H3PO4(aq)+H2O(l)↔H2PO4¿The neutralization reaction for the weak phosphoric acid titrated by a strong base, NaOHis given by:−¿(aq)+H2O(aq)−¿(l)↔H2PO4¿H3PO4(aq)+O H¿