Chromatography

_________________ utilizes a stationary and a mobile phase to separate mixtures based on their affinity for each phase.

• filtration
• chromatography
• distillation
• osmosis

The mobile phase in paper chromatography is typically a

• plasma
• solid
• gas
• liquid

The substance in the mixture that has the greatest affinity for the mobile phase will travel

• fastest
• slowest

The substance in the mixture that has the greatest affinity for the stationary phase will travel

• fastest
• slowest

The retention factor is used

• to zero the chromatography scale
• to identify unknown compounds in a sample
• to retain solvent
• as a starting tool for chromatography

A qualitative test will reveal....

• identity of a material
• amount of a sample
• usefulness of a compound
• purity of a substance

Which process will NOT yield a positive identity of a substance?

• Electrophoresis
• TLC
• Infrared Spec
• GC with MS

Which instrument is used to measure and record the absorption spectrum of a chemical substance?

• Laser
• TLC
• Mass spectrograph
• Spectrophotometer

Tags

NGSS.HS-PS4-4

Separates gaseous substances in a calibrated column into different components

• Thin Layer Chromatography
• HPLC
• Gas Chromatography
• Mass Specroscopy

When using water as a solvent which type of molecule is likely  to have the highest  R_f value

• polar
• non-polar