(a) In performing a titration, why is it better to use a solution of a concentration such that 30-45 mLis required, instead of a more concentrated solution that might only require about 5 mL to reachthe end point?(b) To make a standardized NaOH solution, why is it better to prepare a NaOH solution of approxi-mate concentration and then standardize with KHP, rather than to weigh accurately some NAOHpellets, dissolve them, and dilute the solution in a volumetric flask?(c ) In analyzing a 0.003 weak acid by titration with 0.00300 M NaOH, why would you be able toobtain greater accuracy by using a pH meter instead of using a color-change indicator such asphenolphthalein?

For an example, assume we have a base of higher concentration and we want to neutralize the acid of…

(a) In performing a titration, why is it better to use a solution of a concentration such that 30-45 mL is required, instead of a more concentrated solution that might only require about 5 mL to reach

(a) In performing a titration, why is it better to use a solution of a concentration such that 30-45 mL is required, instead of a more concentrated solution that might only require about 5 mL to reach

Chemistry

9th Edition

ISBN:9781133611097

Author:Steven S. Zumdahl

Publisher:Steven S. Zumdahl

Chapter15: Acid-base Equilibria

Section: Chapter Questions

Problem 7RQ: Sketch the titration curve for a weak acid titrated by a strong base. When performing calculations...

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Question

(a) In performing a titration, why is it better to use a solution of a concentration such that 30-45 mL
is required, instead of a more concentrated solution that might only require about 5 mL to reach
the end point?
(b) To make a standardized NaOH solution, why is it better to prepare a NaOH solution of approxi-
mate concentration and then standardize with KHP, rather than to weigh accurately some NAOH
pellets, dissolve them, and dilute the solution in a volumetric flask?
(c ) In analyzing a 0.003 weak acid by titration with 0.00300 M NaOH, why would you be able to
obtain greater accuracy by using a pH meter instead of using a color-change indicator such as
phenolphthalein?

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