Chromotography

Question 1

Paper Chromatography

Answer 1

It is used to separate mixtures of soluble substances

Question 2

Stationary phase

Answer 2

Paper chromatograph that is very uniform and absorbent paper

Question 3

Mobile phase

Answer 3

Is the solvent that moves through the paper carrying different substances with it.

Question 4

Chromatogram

Answer 4

• It is produced by separating of Chromatography.
• A paper Chromatogram can be used to distinguish between pure and impure substances.
• a pure substance produces one spot on the Chromatogram.
• a impure substance produces two or more spots.

Question 5

Rf value

Answer 5

It can be used to identify Uknown chemicals if they can be compared to a range of reference substances.

Question 6

Calculation for Rf value

Answer 6

Rf value = Distance travelled by the substance / Distance travelled by the solvent