C2 Chromatography Flashcards
1
Q
Paper chromatography
A
The solvent (mobile phase) will move up the paper (stationary phase). The inks that are soluble will dissolve into the solvent and be moved up the paper, the more soluble the ink the higher up the paper the ink dot travels.
2
Q
Same Rf value
A
Same Rf value = same ink
3
Q
Rf value
A
Rf value = Distance moved by ink / Distance moved by solvent
4
Q
Lower pencil line
A
Pencil ‘base line’ you place your ink dots here and measure from this line.
5
Q
Upper pencil line
A
Pencil - ‘solvent line’ you measure the solvent distance to
6
Q
Element
A
A single type of atom.
7
Q
Compound
A
Two or more elements chemically bonded together.
8
Q
Mixture
A
Two or more elements or mixtures not chemi- cally bonded together.
9
Q
Pure
A
Contains a single type of element or compound.
10
Q
Solvent
A
A liquid that something may dissolve in.
11
Q
Solute
A
A solid that may dissolve.
12
Q
Solution
A
A mixture of a solute in a solvent.
13
Q
Soluble
A
A substance that will dissolve.
