Title :
Acid Base Titration
Abstract : By using acid-base titration, we determine the pH of a certain solution which
we used weak acids in this experiment. The titrations were carrying out by
titrating acetic acid, phosphoric acid and amino glycine acid with sodium
hydroxide (NaOH), the base. For each titration, we record its pH using pH
meter. Then, the data collected were derived into graph and analyze it by
determine its pKa value, inflection and equivalent point based on
“Henderson-Hasselbalch” equation. The graphs were compared between those three
weak acids.
Introduction :
Acid-base reactions are one of the important chemical interactions. They are vital
to both environmental and industrial systems. It is known for its important
variable, pH, controls toxicity, mobility, solubility and aquatic ecosystem. A titration
is an analytical technique that allows the quantitative determination of a
dissolved substance being titrated which known as an analyte. In a titration of
a weak acid with strong base the titrant, involves the direct transfer of protons
from the weak acid to the hydoxide ion (OH-). The titration curve is a graph of the
volume of titrant, or in our case the volume of strong base, plotted against
the pH.
Equation involve: Henderson-Hasselbalch equation
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