Ex. A sample that may contain NaOH, Na₂CO3, NaHCO3, and inert matter alone or in compatible combination is titrated with 0.1000 N HCI with phenolphthalein as the indicator and the solution became colorless after the addition of 48.8 mL. Methyl orange is then added and 14.55 mL more of the acid are needed for the color change. If the sample weighs 2.345 grams, it contains a.5.842% NaHCO3 and 6.577% Na₂CO3 b.6.577% Na2CO3 and 5.842% NaOH c. 65.77% Na₂CO3 and 5.842% NaHCO3 d. 65.77% Na₂CO3 and 5.842% NaOH

Ex. A sample that may contain NaOH, Na₂CO3, NaHCO3, and inert matter alone or in compatible combination is titrated with 0.1000 N HCI with phenolphthalein as the indicator and the solution became colorless after the addition of 48.8 mL. Methyl orange is then added and 14.55 mL more of the acid are needed for the color change. If the sample weighs 2.345 grams, it contains a.5.842% NaHCO3 and 6.577% Na₂CO3 b.6.577% Na2CO3 and 5.842% NaOH c. 65.77% Na₂CO3 and 5.842% NaHCO3 d. 65.77% Na₂CO3 and 5.842% NaOH

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter15: Acid–base Equilibria

Section: Chapter Questions

Problem 57P

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