SC2c Paper Chromatography

Question 1

What can chromatography be used for

Answer 1

Find out which coloured compounds a mixture contains

Question 2

Whats is paper chromatography and how does it work

Answer 2

A simple technique that shows the amount of substances within a mixture . It works because some compounds dissolve better in a solvent than others .when a solvent moves a long a Piece of paper it carries the different substances in the mixture at different speeds , so they are separated

Question 3

Different phases in paper chromatography

Answer 3

Solvent - mobile phase

Paper - stationary phase

Question 4

What is the R-value in paper chromatography

Answer 4

R= distance moved by the spot /distance moved by the solvent

Question 5

What can paper chromatography used to do

Answer 5

Paper chromatography can be used to:

Distinguish between pure and impure substances
-Identify substances by comparing the patterns on the chromatogram with the patterns formed by -known substances
-Identify substances by calculating their R value