Paper chromatography

What is paper chromatography used for?

• for measuring the temperature of liquids

• separates components of mixtures, such as dyes in inks or pigments in plant extracts.

• identify the molecular weight of substances.

What does a single spot on chromatogram indicate?

• It means the ink is contaminated

• the ink contains only one component or pure compound

• the ink contain mixtures of compound or impure compound

What should the starting point / baseline be drawn with?

• pencil

• ink

• marker

• crayon

The solvent level should start above the pencil line of the chromatogram

• TRUE

• FALSE

How many substances are in sample D?

• 9

• 3

• 2

• 1

Label the components of the chromatography setup.

a

b

c

d

starting point / baseline

Solvent

ink

Chromatography paper

Multiple spots in the chromatogram indicate pure substance

• TRUE

• FALSE

Which colours from A - E does black food coloring contain?

• A

• B

• A and E

• C and D

Tags

NGSS.MS-PS1-2

Why ink A produce no result in chromatogram paper after 10 mins of experiment

• Because ink A is not concentrated

• Because ink A has dissolved in the solvent

• Because ink A is insoluble in water

If ink A is insoluble in water, which solvent can be used to replace water?

• Paint

• Methanol or ethanol

• orange juice

• milk