Elements, compounds & mixtures Flashcards
1
Q
Compound
A
2 or more elements chemically bonded
2
Q
Melting points of pure substances
A
Smaller range than impure
3
Q
Rf value calculation
A
=distance travelled by solute / distance travelled by solvent
4
Q
Filtration purpose
A
Insoluble solid from liquid
5
Q
what happens to the liquid
When describing simple distillation - what word/process to include?
A
6
Q
Method for separating 2 compounds with similar boiling points
A
fractional distillation
7
Q
method for separating compounds with large differences in boiling points
A
simple distillation
8
Q
what to consider if qu about mixtures and how to separate
A
properties of substances within mixture
which method of separation most appropriate
does it need more than 1 method of separation?
