Chemistry: Chromatography Exam Questions and Answers 100% Pass

Chemistry: Chromatography Exam
Questions and Answers 100% Pass


What is chromatography? -

[ANSWER]: Technique used to separate and analyse substances present

in the mixture




QUESTION: What are components? -

[ANSWER]: Substances present in the mixture that are being seperated




QUESTION: What is a chromatogram? -

[ANSWER]: Patten of bands and sports




QUESTION: What happens to components in chromatography? -

[ANSWER]: As the components in the ink are swept upwards over the

stationary phase by the solvent, they undergo a continual process of

, absorption onto solid stationary phase, followed by desorption and

dissolving into the mobile phase




QUESTION: What depends on the components to stick to the

stationary phase? -

[ANSWER]: The polarity of the stationary phase and the component

molecules. The attraction of the components to the solvent molecules is

determined by their polarity.




QUESTION: What does the rate of movement of each component

depend on and why do components separate? -

[ANSWER]: 1. How strongly the component absorbs onto stationary

phase

2. How readily the component dissolves in the mobile phase

Components separate because they undergo these 2 processes to

different degrees