Introductory Chemistry: An Active Learning Approach
6th Edition
ISBN:9781305079250
Author:Mark S. Cracolice, Ed Peters
Publisher:Mark S. Cracolice, Ed Peters
Chapter3: Measurement And Chemical Calculations
Section: Chapter Questions
Problem 5E
Related questions
Question
Calculating molar mass. A 0.48 gram sample of an unknown amino acid is titrated with 0.5 M NaOH. Based on the titration curve generated below, what is the molar mass of the amino acid? (Two inflection points are provided. Does it matter which one is used? If not, which one is the better choice?)
Determining pKa. In CH302 Unit 2 you learned how to find the pKa of a weak acid at half the titration volume to reach the equivalence point when a 1:1 buffer exists and pH = pKa. Using this method, estimate the two pKas for the amino acid from the titration curve below.
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