Answered: back titration done for this analysis?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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%N in sample can be obtained by converting all N containing compounds to NH₃. The generated NH₃ is then reacted with excess HCl and excess HCl is backtitrated with NaOH.

Why is back titration done for this analysis?

a.Titration with strong acid and strong base will produce sharper endpoint than titration with strong acid and weak base.

b.Nitrogen compounds will only react with excess acids.

c.Backtitration will be faster than doing direct titration.

d.NH₃ is a weak base and large amount of titrant is needed to reach equivalence point.

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