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Science
Chemistry
Acids and Bases
π
8.7 Acid-Base Titrations
Why do we perform titrations?
used to determine an unknown
CONCENTRATION OR pH
using a standing solution (solution with known concentrations).
Acid + Base β Salt + Water
Titrant
: stuff in the burette.
Sample
: stuff in the flask.
Equivalence point
: point where neutralization is complete. [H+] = [OH-]
strong acids and strong bases; pH = 7 in strong/strong; [H+] = [OH-]
weak / strong; ph does not equal 7; [H+] does not equal [OH-] due to hydrolysis of H2O
Endpoint
: point in a titration where an observable change occurs.
<<Strong Acid, Strong Base: HNO3 (aq) + NaOH(aq) β H2O(l) + NaNO3 (aq)<<
<<HC2H3O2(aq) + NaOH(aq) β H2O(l) + NaC2H3O2(aq)<<
Problem 2: Determine the [H+] and pH of the solution at:
Before the reaction starts (pH of a weak acid)
At equivalence point (pH of a salt solution)
Beyond equivalence point (pH of a strong base)
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Chapter 29 - Organic Polymer Chemistry
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