Separating Techniques Flashcards
1
Q
What’s a mixture
A
Substances mixed together but not chemically combined
2
Q
Impurity
A
Unwanted substances, mixed with wanted substances
3
Q
How to check for purity
A
Check melting and boiling point
4
Q
Filtration is used to separate
A
Solid from a liquid
5
Q
Crystallisation
A
Solute from its solution
6
Q
Evaporation
A
Solute from its solution
7
Q
Simple distillation
A
Solvent from a solution
8
Q
Fractional distillation
A
Liquids from each other
9
Q
Paper chromatography
A
Different substances from a solution
10
Q
Evaporation vs crystallisation
A
Evaporation is faster, size of solid form : crystallisation is bigger
11
Q
Miscible
A
Can mix
12
Q
Immiscible
A
Unable to mix
13
Q
Rf value
A
Distance travelled by amino acid/distance travelled by solvent
