(i) An unknown sample (0.100 g dissolved in 100 mL ethanol) was then analysed by GC, among a number of other peaks, there was one at 9.5 min with integration 1250. Discuss how this could be quickly confirmed as being due to A. (ii) An aliquot (1 mL) of a solution of B (0.100 g dissolved in 100 mL ethanol) was added to the unknown sample. Now in addition to the peak at 9.5 min (integration 1250) there was a peak at 11.5 (integration 1000). Determine how much A was in the unknown sample.
(i) An unknown sample (0.100 g dissolved in 100 mL ethanol) was then analysed by GC, among a number of other peaks, there was one at 9.5 min with integration 1250. Discuss how this could be quickly confirmed as being due to A. (ii) An aliquot (1 mL) of a solution of B (0.100 g dissolved in 100 mL ethanol) was added to the unknown sample. Now in addition to the peak at 9.5 min (integration 1250) there was a peak at 11.5 (integration 1000). Determine how much A was in the unknown sample.
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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(i) An unknown sample (0.100 g dissolved in 100 mL ethanol) was then analysed by GC, among a number of other
peaks, there was one at 9.5 min with integration 1250. Discuss how this could be quickly confirmed as being due to A.
(ii) An aliquot (1 mL) of a solution of B (0.100 g dissolved in 100 mL ethanol) was added to the unknown sample. Now in addition to the peak at 9.5 min (integration 1250) there was a peak at 11.5 (integration 1000). Determine how much A was in the unknown sample.
Transcribed Image Text:A solution containing an equal parts (by weight) mixture of two liquids A and B
dissolved in ethanol was analysed by gas chromatography (GC) on a Carbowax
column giving the chromatogram data in the Table below (retention time of an
unretained solute was 1.2 min):
Compound Retention time
(min)
9.50
11.5
A
B
Baseline width (min)
0.35
0.45
Integration
2500
5000
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