Chemistry Lab 5 - Kyle Brush Heather Rankin Lab Partner Orlando Section Chem 112 006 Phosphoric Acid Titration Curves Research Questions The initial

Chemistry Lab 5 - Kyle Brush Heather Rankin Lab Partner...

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Kyle Brush Heather Rankin Lab Partner: Orlando Section: Chem. 112 006 Phosphoric Acid Titration Curves Research Questions: The initial concentration of the H 3 PO 4 was found to be we determined this by taking the mL at .1 M NaOH at equivalence point 1 followed by obtaining moles of NaOH and For the H 3 PO 4 solution the Pk a1 was determined d and the Pk a2 was . In the soft drink experiment we were assigned Dr. Pepper. We found that the concentration in Dr. Pepper to be . Observations and Results: [NaOH ] (M) equivalence point pH at equiv. point NaOH vol. to reach equiv point (mL) NaO H (mol) H PO (mol) Starting [H PO ] (M) first Second Table 1. Phosphoric Acid Titration data and concentration results. Equilibrium # pKa K a 1 2 Table 2. Phosphoric Acid equilibrium constants. [NaOH equivalence pH at equiv. NaOH vol. to NaO H PO Starting
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] (M) point point reach equiv point (mL) H (mol) (mol) [H PO ] in
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