Chromatography
Chemistry ⇒ Analytical Chemistry
Chromatography starts at 12 and continues till grade 12.
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See sample questions for grade 12
A chromatogram shows three peaks at retention times of 2 min, 5 min, and 8 min. What does this indicate about the sample?
A chromatographic separation resulted in overlapping peaks. Suggest one way to improve the resolution.
A student performed paper chromatography and found that the blue dye traveled 5 cm while the solvent front traveled 10 cm. What is the Rf value of the blue dye?
A student uses TLC to separate a mixture and observes that two spots have the same Rf value. What could this indicate?
Define retention time in chromatography.
Describe how you would identify an unknown compound using chromatography.
Describe the difference between the stationary phase and the mobile phase in chromatography.
Describe the main advantage of high-performance liquid chromatography (HPLC) over traditional column chromatography.
Explain the difference between adsorption and partition chromatography.
Explain the role of the eluent in chromatography.
Explain why a mixture of solvents is sometimes used as the mobile phase in chromatography.
Explain why different compounds travel different distances in paper chromatography.
In chromatography, what does a low Rf value indicate about a compound's affinity for the stationary phase?
Name one application of chromatography in the food industry.
What is the main principle behind chromatography?
