10.0 ml of .15M H3A (Ka1 = 2.5 x 104, Ka2 = 3.5 x 10-8, Ka3 = 5.0 x 10-12) is titrated with .10M NaOH. a) Sketch the titration curve and write in these values on the graph: ml of NaOH used at each endpoint, pH at the start, pH at each endpoint (except the last), pH's at 10%, 90%, and midway through each buffer region, and pH at 50ml past the last endpoint. b) What is the major species at pH = 10.0? (use your curve to prove your answer).

10.0 ml of .15M H3A (Ka1 = 2.5 x 104, Ka2 = 3.5 x 10-8, Ka3 = 5.0 x 10-12) is titrated with .10M NaOH. a) Sketch the titration curve and write in these values on the graph: ml of NaOH used at each endpoint, pH at the start, pH at each endpoint (except the last), pH's at 10%, 90%, and midway through each buffer region, and pH at 50ml past the last endpoint. b) What is the major species at pH = 10.0? (use your curve to prove your answer).

Chemistry: Principles and Practice

3rd Edition

ISBN:9780534420123

Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Chapter16: Reactions Between Acids And Bases

Section: Chapter Questions

Problem 16.51QE

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Similar questions

Calculate the pH change when 10.0 mL of 0.100-M NaOH is added to 90.0 mL pure water, and compare the pH change with that when the same amount of NaOH solution is added to 90.0 mL of a buffer consisting of 1.00-M NH3 and 1.00-M NH4Cl. Assume that the volumes are additive. Kb of NH3 = 1.8 × 10-5.
For the titration of 50.0 mL of 0.100-M HCl with 0.100-M NaOH, calculate the pH when these volumes of NaOH have been added: (a) 10.0 mL (b) 25.00 mL (c) 45.0 mL (d) 50.5 mL
Draw the titration curve for the titration of 50.0 mL of 0.100-M NaOH using 0.100-M HCl as the titrant.
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