8) 10.0 ml of.15M H3A (Kat = 2.5 x 104, Kaz = 3.5 x 108, 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 16.58QE
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8) 10.0 ml of .15M H3A (Kat = 2.5 x 104, Kaz = 3.5 x 10, 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).
Transcribed Image Text:8) 10.0 ml of .15M H3A (Kat = 2.5 x 104, Kaz = 3.5 x 10, 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).
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