
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Explain why the dye spots are elongated and not round on your chromatogram.
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- How can TLC be used to determine if a sample is pure?arrow_forwardcalculate Rfs for each spot on your chromatogramarrow_forward2 Determine the weight % composition of the sample of Cut 3 from the gc trace you ran Peak Area for Cyclohexane Peak Area for Octane Weight % Cyclohexane Weight % Octanearrow_forward
- Give at least two reasons for using very dilute solutions when doing fluorescence spectrometryarrow_forwardwhat chromatography seperation how is tlc part of itarrow_forwardQUESTION 5 In a chromatographic separation using a polar stationary phase and a mobile phase composed of 60% hexane and 40% ethyl acetate, two compounds, benzene (peak A) and toluene (peak B), are eluted. The width of peak A at its base is 1.2 min, the width of peak B at its base is 1.3 min, and the retention time of peak A is 5.2 min and peak B is 3.5 min. What is the resolution (Rs) between these two peaks and is it acceptable? R = 1.36. It is not an acceptable resolution. R = 0.74. It is an acceptable resolution. R = 1.36. It is an acceptable resolution. R = 0.74. It is not an acceptable resolution.arrow_forward
- A GC-MS was used to analyze an unknown sample. Based off the chromatogram, at least how many different compounds were in this sample? Detector Signal u M Retention Timearrow_forwardhow does TLC determine if a sample is pure?arrow_forwardThe ppm concentration of Pb2+ in a blood sample were measured with Spectrophotometry. 5.00 mL of a blood sample were taken and this sample gave a signal of 0.301 a.u.. Another 5.00 mL of a blood sample were mixed with 0.50 mL og 1.75 ppm Pb2+. Then, this mixture was diluted to 25.00 mL and this diluted mixture gave a signal of 0.406 a.u.. What is the ppm concentration of a blood sample?arrow_forward
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