states of matter and mixtures: chromatograpy Flashcards
What is chromatography?
A technique for separating mixtures into their individual components.
True or False: Chromatography can be used for both qualitative and quantitative analysis.
True
Fill in the blank: In chromatography, the stationary phase is typically a ________ material.
solid or viscous liquid
Which type of chromatography uses a gas as the mobile phase?
Gas chromatography
What is the main purpose of the mobile phase in chromatography?
To carry the components of the mixture through the stationary phase.
Multiple choice: Which of the following is NOT a type of chromatography? A) Paper B) Gas C) Solid D) Liquid
C) Solid
What does Rf value stand for in paper chromatography?
Retention factor
True or False: Higher Rf values indicate that a component travels further on the chromatogram.
True
What is the role of a detector in chromatography?
To identify and quantify the separated components.
Fill in the blank: In liquid chromatography, the liquid phase is known as the ________ phase.
mobile
Multiple choice: Which chromatography technique is best for separating large biomolecules? A) Ion exchange B) Thin-layer C) Gas D) Affinity
D) Affinity
What is the principle behind column chromatography?
Separation is based on differential adsorption of compounds on the stationary phase.
True or False: In High-Performance Liquid Chromatography (HPLC), the mobile phase is under high pressure.
True
What is the main advantage of using chromatography in analytical chemistry?
It allows for the separation and analysis of complex mixtures.
Fill in the blank: In reverse-phase chromatography, the stationary phase is ________ in nature.
nonpolar
