Paper chromatography 2023

Front

What is paper chromatography?

Back

A technique used to separate and analyze mixtures of substances, particularly dyes, based on their different rates of movement through a medium (paper) when a solvent is applied.

Front

What is the role of the solvent in paper chromatography?

Back

The solvent carries the substances up the paper, allowing for separation based on solubility.

Front

What does it mean if a dye is described as 'insoluble'?

Back

It means that the dye does not dissolve in the solvent used in the chromatography process.

Front

How does polarity affect the movement of dyes in paper chromatography?

Back

Dyes that are more polar will have a greater attraction to the polar paper and will not travel as far as less polar dyes.

Front

What is the significance of the starting pencil line in paper chromatography?

Back

The starting pencil line marks where the sample is applied and must be below the solvent level to prevent the sample from dissolving directly into the solvent.

Front

Why is pencil used instead of ink to mark the chromatography paper?

Back

Pencil is used because it is insoluble and will not interfere with the results of the chromatography.

Front

What happens to more soluble colors during paper chromatography?

Back

More soluble colors will travel farther up the paper compared to less soluble colors.

Front

What is the solvent front in paper chromatography?

Back

The solvent front is the highest point reached by the solvent on the chromatography paper.

Front

How can you determine which dye is more polar based on chromatography results?

Back

The dye that travels less distance on the paper is more polar, as it has a stronger attraction to the paper.

Front

What is the purpose of using chromatography in scientific studies?

Back

Chromatography is used to separate and identify components in a mixture, analyze substances, and determine purity.