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BCH210H1 (352)
Lecture 2

Lecture 2 Text Notes titration

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Department
Biochemistry
Course
BCH210H1
Professor
Stavroula Andreopoulos
Semester
Summer

Description
Lecture 2 – Titration Curves Titration Curves - titration – analytical method to determine the amount of acid in solution - measured volume of acid is titrated by adding solution of a base of known concentration - pH of the solution is determined – plot of pH versus amount of OH added created a titration curve - polyprotic acid – substance has more than one dissociable proton and equal equivalents of OH to the number of dissociable protons are needed to neutralize it Buffers - buffers – solutions that resist changes in pH as acid or base is added - buffer is typically composed of a weak acid and its conjugate base, with a pH almost equal to its pK a - at pH values more than 1 pH unit from pK , buffersabecome ineffective because concentration of one of the components is too low to absorb the influx of H or OH + -
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