A 0.5000 g sample contains NaHCO₃, Na₂CO₃ , and NaOH, either alone or in permissible combination. Titration of a 50.0-mL portion to a phenolphthalein end point requires 25.1 mL of 0.100 M HCl. A second 50.0-mL aliquot requires 50.2 mL of the HCl when titrated to a bromocresol green end point. Deduce the composition, and calculate the percent composition of the substances. Find the mmol of Na2CO3, g of Na2CO3, and concentration of Na2CO3.
A 0.5000 g sample contains NaHCO₃, Na₂CO₃ , and NaOH, either alone or in permissible combination. Titration of a 50.0-mL portion to a phenolphthalein end point requires 25.1 mL of 0.100 M HCl. A second 50.0-mL aliquot requires 50.2 mL of the HCl when titrated to a bromocresol green end point. Deduce the composition, and calculate the percent composition of the substances. Find the mmol of Na2CO3, g of Na2CO3, and concentration of Na2CO3.
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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A 0.5000 g sample contains NaHCO₃, Na₂CO₃ ,
and NaOH, either alone or in permissible
combination. Titration of a 50.0-mL portion to
a phenolphthalein end point requires 25.1 mL
of 0.100 M HCl. A second 50.0-mL aliquot
requires 50.2 mL of the HCl when titrated to a
bromocresol green end point. Deduce the
composition, and calculate the percent
composition of the substances.
Find the mmol of Na2CO3, g of Na2CO3, and concentration of Na2CO3.
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