Given the following experimental data calculate the molarity and the p K a of

Given the following experimental data calculate the

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2.Given the following experimental data, calculate the molarity and the pKaof the acid analyte (HA) in the titration, if the balance neutralization reaction is: © 2016 Carolina Biological Supply Company
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7 HA + NaOH à NaA + H 2 O. A pH reading of 3.65 was obtained when 13.0 mL of 0.413 M NaOH was added to the 25.0 mL analyte. The endpoint was achieved when 31.25 mL of NaOH had been added. a. (0.413 x 31.25)/25 = 0.52 M b. 13 mL added to 25 mL = 38 mL 0.413 M x 0.013L/ 0.038 L = 0.141 M 0.516 M x 0.025 L/ 0.038 L = 0.339 M pKa = 3.65 Photos Photo 1 Insert the photo of the 25-mL Erlenmeyer flask after the addition of phenolphthalein from Activity 1, step 6. Photo 2 Insert the photo of the 25-mL Erlenmeyer flask at the endpoint of the titration from Activity 1, step 13. © 2016 Carolina Biological Supply Company
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8 © 2016 Carolina Biological Supply Company
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  • Spring '19
  • RANDY WEINTRAUB
  • pH, Carolina Biological Supply Company

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