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8:30 LAB DATA TABLE Determining the Phosphoric Acid Content in Soft Drinks M 10.1046 mL Concentration of NaOH NaOH volume at the 1st Equivalence point. Use 2nd Derivative plot to find the Eq point NaOH volume at the 2nd Equivalence point. Use 2nd Derivative plot to find the Eq point. 7.02 mL 12.9 Volume of NaOH added at 1 equivalence point ml Moles NaOH mol Moles HPO4 mol Concentration of H3PO. mol/L What are the pk1 and pk 2 values for the unknown diprotic acid? (From data table list endpoint volumes, one-endpoint volumes and the pH values. Don't forget to mark the graph as described.) Use hover the cursor over the volumes for the V2 endpoints to determine the pH. Need to be on the pH vs. Volume graph. Endpoint 1 pH @ Endpoint 1 1/2 Endpoint 1 pH @ V2 Endpoint 1 ркі Volume (mL) Volume (mL) 7.02 4.69 3.51 2.67 2.67 Endpoint 2 PH @ Endpoint 2 1/2 Endpoint 2 pH @ 72 Endpoint 2 pKz Volume (mL) Volume (mL) 12.9 7.37 9.96 6.424 6.424