Chromatography

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

• fastest

• slowest

A substance is soluble if it can be dissolved. In paper chromatography, the most soluble solute _____________________ .

• does not move from the start point

• stays closest to the start point

• travels furthest away from the start point

• can be found in the middle of the chromatogram

What molecules move up the paper to carry the different colors of ink?

• color

• fat

• water

Tags

NGSS.HS-ESS2-5

Why is Chromatography useful?

• It can be used as medicine.

• It can be used for finding clues at a crime scene

• It can be used to make bombs.

• It can reduce the lack of food and water.

Tags

NGSS.HS-ETS1-3

If a substance is not soluble in the solvent, what happens to the spot placed on the start line?

• Dot moves to the top of the paper

• Dot does not move at all

• Dot moves to the left or right

• Dot moves down to the bottom of the paper

Why must the base line be drawn in pencil and not pen?

• Pencil is good at keeping substances in place.

• Pencil is soluble in water

• Pencil is insoluble in water

• Pencil is not coloured

Chromatography separates a mixture of dyes on the basis of their

• density or weight

• gravity

• boiling point

In chromatography, what is the primary purpose of the stationary phase?

• To dissolve the sample

• To carry the sample through the system

• To separate components based on their affinity

• To react chemically with the sample

Which of the following is a common application of chromatography in the real world?

• Measuring the speed of light

• Identifying pollutants in water

• Calculating gravitational force

• Determining the age of fossils

In paper chromatography, why is it important to keep the solvent level below the baseline of the sample?

• To prevent the sample from dissolving in the solvent

• To ensure the sample travels with the solvent front

• To avoid the sample from being washed away

• To allow the sample to react with the solvent