chromography

Question 1

whats chromatography used for

Answer 1

to separate mixtures of soluble substances in a solution
eg inks dyes and colouring agents

Question 2

whats the method

Answer 2

use a pencil and draw the baseline on the chromatography paper
use a capillary tube place a spot of the substance
place the paper in a beakeer with solvent
the solvent travels up the paper
when the solvent travled up mark up the solvent front
leave the paper to dry

Question 3

what will a pure substance produce do on the paper
what about mixtures

Answer 3

it will produce a single spot in chromatography
mixtures will produce more than one spot

Question 4

whats the stationary phase

Answer 4

is the paper

Question 5

whats the mobile phase

Answer 5

the solvent
–mobile means changes—

Question 6

how do you work out the rf value

Answer 6

distance moved by the substance / distance moved by the solvent

Question 7

if the substance is closet to the solvent front what does that mean

Answer 7

its the most soluble