Mindanao State University – Iligan Institute of Technology
College of Science and Mathematics
Department of Chemistry
Activity #1
DETERMINATION OF ACID DISSOCIATION CONSTANT OF ACETIC ACID USING POTENTIOMETRIC
TITRATION
ABSTRACT
Acid/base titration can be monitored by either using an indicator or with the use of an
instrument, the pH-meter. The objective of the activity is to obtain the equivalence point of the
titrated NaOH in analyte acetic acid. The equivalence point will then be used to calculate for the
acid dissociation constant of the acid being titrated. The acetic acid sample with volume 40 mL
had its pH measured by the calibrated pH-meter. The titrant was then carefully added and the
change in pH as well as the volume of the titrant added was then recorded. After obtaining the
data, a titration curve with its first derivative and second derivative was plotted to find the
equivalence point. The molar concentration and the acid dissociation of the acetic acid were
calculated from the half-equivalence point obtained in the graphs. (Data shit and conclusion)
INTRODUCTION
METHODOLOGY
DATA AND CALCULATIONS
DISCUSSION
CONCLUSION