An unknown sample containing mixed alkali (NaOH, NaHCO3, or Na2CO3) was analyzed using t double flask method. A 250 mg sample was dissolved in 250 mL CO2 free water. A 20.0 mL aliq of this sample required 11.3 mL of 0.009125 M HCI solution to reach the phenolphthalein end point. Another 29.0 mL aliquot of the sample was titrated to the bromocresol green endpoint u 31.1 mL of the standard acid. What is/are the component/s of the sample? O Cannot be determined O NAHCO, only O NAOH and Na,CO3

An unknown sample containing mixed alkali (NaOH, NaHCO3, or Na2CO3) was analyzed using t double flask method. A 250 mg sample was dissolved in 250 mL CO2 free water. A 20.0 mL aliq of this sample required 11.3 mL of 0.009125 M HCI solution to reach the phenolphthalein end point. Another 29.0 mL aliquot of the sample was titrated to the bromocresol green endpoint u 31.1 mL of the standard acid. What is/are the component/s of the sample? O Cannot be determined O NAHCO, only O NAOH and Na,CO3

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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Question

An unknown sample containing mixed alkali (NAOH, NaHCO3, or NazCO3) was analyzed using the
double flask method. A 250 mg sample was dissolved in 250 mL CO, free water. A 20.0 mL aliquot
of this sample required 11.3 mL of 0.009125 M HCI solution to reach the phenolphthalein end
point. Another 29.0 mL aliquot of the sample was titrated to the bromocresol green endpoint using
311 mL of the standard acid. What is/are the component/s of the sample?
O Cannot be determined
O NAHCO3 only
O NAOH and Na,CO3
O NazCO3 only
O NAHCO, and Na2CO3

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