answer the following A. The concentration of ammonia (17.031 g/mol) can be determined through backtitration. After addition of 10.00 mmol of HCl into a sample of NH3 solution,back-titration with Na.CO. revealed that 5.00 mmol of HCl remained. Whatwould be the concentration in %w/v of ammonia if the 10.00 mL of the samplewas analyzed?B. In order for all of the analyte to be consumed completely, an excess of areagent has to be added. If 10.00 mL of a 0.1000 M HCI is needed in the backtitration, what volume of a 0.5000 M NaOH should be added to a sample thatcontains 2.000 mmol of aspirin? 1. True of False: During back titration of aspirin, a more dilute than usual NaOHsolution was used, while back-titration of the unreacted base and the rest ofthe experiment followed the usual procedure. Under this condition, thecalculated amount of analyte will be higher expected because the amount ofaspirin consumed by NaOH will be lower.2. Identify two among the following situations that can most likely be thecause. In an experiment to determine the content of acetylsalicylic acid inan aspirin tablet, the result showed that the calculated mass ofacetylsalicylic acid was much higher than the indicated amount in thepackaging.Choices:a. Aspirin was not completely hydrolyzed.b. Tablet contained other acids that can be neutralized by a base.c. Molar mass of salicylic acid was used instead of acetylsalicylic in thecalculations.d. Mass of the tablet recorded included the packaging.e. After grinding, some of the pulverized tablet was not transferred to theflask.f. The unreacted base was over titrated during back titration.

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- The concentration of ammonia (17.031 g/mol) can be determined through back titration. After addition of 10.00 mmol of HCI into a sample of NH, solution, back-titration with Na.CO, revealed that 5.00 mmol of HCI remained. What would be the concentration in %w/v of ammonia if the 10.00 mL of the sample was analyzed?

- The concentration of ammonia (17.031 g/mol) can be determined through back titration. After addition of 10.00 mmol of HCI into a sample of NH, solution, back-titration with Na.CO, revealed that 5.00 mmol of HCI remained. What would be the concentration in %w/v of ammonia if the 10.00 mL of the sample was analyzed?

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

Chapter11: Solutions

Section: Chapter Questions

Problem 26P

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