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4. A student was performing this experiment with an antacid tablet which contained CaCO3 but forgot to heat the antacid solution prior to starting the titration. As sodium hydroxide was added the student noticed the formation of an insoluble white precipitate. a. Identify the precipitate. (Hint: the precipitate was soluble under acidic conditions) b. Would the presence of this precipitate cause the students experimentally determined volume of NaOH, required for the back-titration, to be incorrectly high or incorrectly low? Briefly explain. c. Would the resulting calculated number of moles of HCl, neutralized by the antacid tablet, be incorrectly large or small? Briefly explain.

4. A student was performing this experiment with an antacid tablet which contained CaCO3 but forgot to heat the antacid solution prior to starting the titration. As sodium hydroxide was added the student noticed the formation of an insoluble white precipitate. a. Identify the precipitate. (Hint: the precipitate was soluble under acidic conditions) b. Would the presence of this precipitate cause the students experimentally determined volume of NaOH, required for the back-titration, to be incorrectly high or incorrectly low? Briefly explain. c. Would the resulting calculated number of moles of HCl, neutralized by the antacid tablet, be incorrectly large or small? Briefly explain.

Chemistry
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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4. A student was performing this experiment with an antacid tablet which contained CaCO3
but forgot to heat the antacid solution prior to starting the titration. As sodium
hydroxide was added the student noticed the formation of an insoluble white
precipitate.
a. Identify the precipitate. (Hint: the precipitate was soluble under acidic conditions)
b. Would the presence of this precipitate cause the students experimentally
determined volume of NaOH, required for the back-titration, to be incorrectly high
or incorrectly low? Briefly explain.
c. Would the resulting calculated number of moles of HCl, neutralized by the antacid
tablet, be incorrectly large or small? Briefly explain. 

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