electrochemistry - Acid Base Titration Part 2 3/03/08 Name:...

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Acid Base Titration Part 2 3/03/08 Name: Ron Walters Partner(s): John Alderman TA: Chad Teters Section 11 Monday 12-3
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Abstract- The purpose of this experiment was to show how polyprotic acids, those acids which can donate more than one proton, will give off extra protons if you keep adding a base to the solution, giving more than one equivalence point. Then, using the pH value at half of the equivalence point, and doing some calculations, we can see that the pH is equal to the pKa value. In order to figure out what our equivalence points were, we used MeasureNet and a drop counter to see how much volume of base was needed to be added to the base in order to make the solution neutral. What we found from our experiments is that Theory- For the experiment to work, we had to use voltaic cells. Voltaic, or galvanic, cells mean that electrons flow from one reactant to the other because the reaction is thermodynamically spontaneous. This is different from electrolytic cells where a pump is needed to move the electrons through. The electrons cause electricity by means of oxidation-reduction reactions, where through the reaction some of the reactants (or products) lose electrons, and some of the
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electrochemistry - Acid Base Titration Part 2 3/03/08 Name:...

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