C1 chromatography Flashcards
What is chromatography?
A technique used to separate mixtures into their individual components.
True or False: Chromatography can only be used for colored substances.
False
Name one common type of chromatography.
Paper chromatography
Fill in the blank: In chromatography, the substance that moves through the stationary phase is called the __________.
mobile phase
What is the stationary phase in paper chromatography?
The paper itself
Multiple Choice: What is the purpose of the mobile phase in chromatography? A) To provide a surface for separation B) To carry the substances being separated C) To stabilize the stationary phase
B) To carry the substances being separated
What does the Rf value represent in chromatography?
The ratio of the distance traveled by the substance to the distance traveled by the solvent front.
True or False: Higher Rf values indicate that a substance is more soluble in the mobile phase.
True
What is one application of chromatography in everyday life?
Testing for drugs in urine samples.
Fill in the blank: In thin-layer chromatography, the stationary phase is usually a thin layer of __________ on a flat surface.
adsorbent material
Multiple Choice: Which factor does NOT affect the Rf value? A) Solvent used B) Temperature C) Color of the substance
C) Color of the substance
What is the role of the solvent in chromatography?
To dissolve the substances and carry them along the stationary phase.
True or False: Chromatography can only be performed in a laboratory setting.
False
Name one advantage of using chromatography.
It can separate complex mixtures into individual components.
Fill in the blank: The distance traveled by the solvent front is measured from the ________ of the chromatography paper.
baseline
What type of chromatography uses a liquid as the mobile phase?
Liquid chromatography
Multiple Choice: In gas chromatography, what is the mobile phase? A) Liquid B) Gas C) Solid
B) Gas
True or False: Chromatography can be used for both qualitative and quantitative analysis.
True
What does a chromatogram show?
The results of the chromatography process, displaying separated components.
Fill in the blank: The process of separating components in chromatography is based on differences in their __________.
affinities for the stationary and mobile phases
