An unknown sample containing moved alkal (NaOH, NaHCO or Na CO) was analyzed using the double flask method. A 250 mg sample was dissolved in 250 m CO₂ free water. A 20.0 ml aliquot of this sample required 11.3 ml. of 0.009125 MHCI solution to reach the phenolphthalein end point. Another 29.0 ml aliquot of the sample was titrated to the bromocresol green endpoint uning 311 mt of the standard acid. How many millimoles of the components are there in the original solid sample) O028 mmol Nejco 00103 mmol NaOH 0.078 mm Na Co O Cannot be determined 01:29 ml NaCO, 0.97 minol NaHCO, 129 mmol NaOH, 097 inmol NaO
An unknown sample containing moved alkal (NaOH, NaHCO or Na CO) was analyzed using the double flask method. A 250 mg sample was dissolved in 250 m CO₂ free water. A 20.0 ml aliquot of this sample required 11.3 ml. of 0.009125 MHCI solution to reach the phenolphthalein end point. Another 29.0 ml aliquot of the sample was titrated to the bromocresol green endpoint uning 311 mt of the standard acid. How many millimoles of the components are there in the original solid sample) O028 mmol Nejco 00103 mmol NaOH 0.078 mm Na Co O Cannot be determined 01:29 ml NaCO, 0.97 minol NaHCO, 129 mmol NaOH, 097 inmol NaO
Chemical Principles in the Laboratory
11th Edition
ISBN:9781305264434
Author:Emil Slowinski, Wayne C. Wolsey, Robert Rossi
Publisher:Emil Slowinski, Wayne C. Wolsey, Robert Rossi
Chapter24: The Standardization Of A Basic Solution And The Determination Of The Molar Mass Of An Acid
Section: Chapter Questions
Problem 3ASA: A 0.3012g sample of an unknown monoprotic acid requires 24.13mL of 0.0944MNaOH for neutralization to...
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Transcribed Image Text:An unknown sample containing mixed alkal (NaOH NaHCO or Na,CO) was analyzed using the double flask method, A 250 mg sample was dissolved in 250 m
CO3 free water. A 20.0 mL aliquot of this sample required 11.3 ml. of 0.009125 M HCl solution to reach the phenolphthalein end point. Another 29.0 ml aliquot of
the sample was bitrated to the bromocresol green endpoint using 31.1 ml of the standard acid. How many millimoles of the components are there in the original
solid sample)
0-928 mmol No.
0.0103 mmol NaOH 0078 m N.CO
Cannot be determined
012 mol NaC0, 197 minol NaHCO
129 mmol NaOH, 097ml Najco
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