Which of the following statements regarding thin layer chromatography are correct? O a. The larger a Rf of a compound, the larger distance it travels on TLC plate O b. When comparing two different compounds, the compound with the larger Rf is more polar O c. Larger Rf means compounds interact weaker with polar surface on the TLC O d. Polar compounds interact more strongly with polar surface of TLC and move faster e. a and b f. a and c

Which of the following statements regarding thin layer chromatography are correct? O a. The larger a Rf of a compound, the larger distance it travels on TLC plate O b. When comparing two different compounds, the compound with the larger Rf is more polar O c. Larger Rf means compounds interact weaker with polar surface on the TLC O d. Polar compounds interact more strongly with polar surface of TLC and move faster e. a and b f. a and c

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...

See similar textbooks

Similar questions

When Na is analyzed by flame atomic emission spectroscopy, what form of Na in the flame is being measured? a. Na (g) b. NaCkg) c Na*(g) d. Nalg) The efficiency of chromatograpnic separation increases with: 2 a. Increase the particle size b. Increasing plate height, H c. Increasing column length d. All answers Which of the following has the greatest solubility? a. Nis (Ksp = 5.6 x 10-16) %3D O b. Fe(OH)2 (Ksp = 2 x 10-15) %3D O c. Zn(OH)2 (Ksp = 4.5 x 10-17) %3D O d. AgBr (Ksp = 3.3 x 10-13)
How can molecules with the same charge at varying amounts be separated by Ion exchange chromatography?
a. Say you are trying to separate two compounds by column chromatography. You run a column and collect the eluent in five fractions. You analyze each fraction by TLC on the same plate (shown below). Based on the TLC plate, how effective was your separation? Consider the purity of each fraction. - - - - - - - - ----| 1 2 3 4 5
If peak A has a width of 10 min and peak B has a width of 16 mins, what is the column resolution?
Different from GCMS, why is an interface needed when coupling HPLC with MS?
To compensate for a complex or unknown matrix, the ● · · ● A. Calibration curve OB. Standard addition Method O C. Internal Standard Method O D. Dilution method O E. Least-Squares Analysis O F. Standardization method should be used to determine the analyte concentration.
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 Time
which of the folowing(s) is/are true ? 1 split ratio in GC is a ratio of sample passed to column to amount of mobile phashe 2 column resolution decreases with increasing column lenght 3 decreasing the tube diameter ,increases the resolution
PLS ANSWER ALL// Choose the correct letter
In a chromatographic analysis of an unknown mixture, compound A has a retention time of 5.56 minutes and a baseline width of O.87, and compound B has a retention time of 6.32 minutes and a baseline width of 0.53 minutes. Are these peaks resolved, and what is the resolution between the two peaks? O Yes, 1.09 O Yes, 0.54 O No, 0.54 O No, 1.09 O There is not enough information given to determine the resolution
The 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?
For recrystallized salicylic acid compound Explain how IR SPECTRUM works using KBr disc on a chemical level.