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Unformatted text preview: Experiment 2 Parts III ‐ V Volumetric Analysis of an Organic Acid 1 V olumetric Analysis Experiment #2- Parts III-V 1 of an Organic Acid Experiment 2 Overview 2 Parts I-II. Preparation/standardization of NaOH titrant solution Part III. Determination of the molar mass of an unknown acid by acid-base titration unknown acid by acid base titration Part IV. Preparation of a 0.1 M solution of unknown acid in a volumetric flask Part V. Determination of the p Ka of the unknown acid from an acid-base titration curve Part III. Molar Mass Determination 3 Unknown acid is monoprotic 1 acid : 1 NaOH Standardized NaOH (Parts I-II) used as a titrant Stoichiometric point: moles NaOH = moles acid M M (g/mol) = Mass of organic acid (g) M.M. (g/mol) = Mass of organic acid (g) [NaOH] (mol/L) x Vol. NaOH (L) Mass of organic acid = experimental value Vol. NaOH = titration end point Perform 1 “quick & dirty” titration + 3 titrations Experiment 2 Parts III ‐ V Volumetric Analysis of an Organic Acid...
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- Summer '08
- unknown acid, Organic acid