Experiment 25 - Kayla Peterpaul Partner: Amanda Javier...

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Kayla PeterpaulPartner: Amanda JavierDetermination of the Dissociation Constant of a Weak Acid26 March 2018CHEM1204.31Dr. Jia MaChemistry DepartmentFairleigh Dickinson UniversityAbstractIn this experiment, the ionization constant of an unknown weak acid was determined by titrating it with a strong base (NaOH solution). This was accomplished by using the titration curve based on the data. The concentration of the unknown acid was also determined by using the base at the equivalence point, its molarity, and the volume of acid used. The results show that the ionization constant for the unknown acid was 5.38 and the concentration was .098M. ExperimentalPage 1 of 8 Experiment 25
Chemicals:Potassium hydrogen phthalate (KHP) CAS: 877-24-7Standard buffer solution CAS: 7778-77-0Unknown solution of a weak acid (~0.1 M)0.1 M NaOH or 19 M NaOH CAS:1310-73-2Phenolphthalein indicator solution CAS: 77-09-8Buffer solution pH= 4.0 CAS: 127-09-3Apparatus:pH meter with electrodesBalance FX-300i SN: 15632089150 mL beakers (4)Buret1 pt plastic bottle with plastic lidHot plate PC-420D 15355224600 mL Erlenmeyer flask250 mL Erlenmeyer flasks (3)25 mL pipet and pipet bulbBuret clamp and ring standWeighing paperWash bottleProcedure:In Part B of the experiment, a titration between KHP and an NaOH solution was Page 2 of 8 Experiment 25

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Term
Spring
Professor
Jia Mah

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