Weak acid and strong base mean before the equilibrium point pH and acid are

Weak acid and strong base mean before the equilibrium

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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 HA + NaOH NaA + H2O.A pH reading of 3.65 was obtained when 13.0 mL of 0.413 M NaOH was added tothe 25.0 mL analyte.The endpoint was achieved when 31.25 mL of NaOH had been added. 3 ©2014, Carolina Biological Supply Company
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Determination of Acetic Acid Concentration in Vinegar Using Titration Data Tables Data Table 1: Titration of Vinegar with Sodium Hydroxide Vinegar Sample 1 Vinegar Sample 2 Vinegar Sample 3 Mass of Vinegar 4.90 g 5.06 g 5.01 g Volume of Vinegar Density = 1.005 g/mL 4.88 ml 5.03 ml 4.98 ml Initial NaOH volume in syringe 10 ml 9.8 ml 9.6 ml Final NaOH volume in syringe 6 ml 6.4 ml 5.0 ml Volume of NaOH Delivered 4 ml 3.4 ml 4.6 ml Moles of NaOH Delivered .006 .0064 .005 Moles of Acetic Acid in Sample .006 .0064 .005 Mass of Acetic Acid in Sample .006 .0064 .005 Calculated Molarity of Acetic Acid in the sampled vinegar 1.23 M 1.27 M 1.00 M Calculated Percent Mass of Acetic Acid in sampled vinegar .151 % .161 % 1 % Average Calculated Percent Mass of Acetic Acid in Sampled Vinegar .437 % 4 ©2014, Carolina Biological Supply Company
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