Chemical Analysis Flashcards
1
Q
A pure substance
A
a single element or compound, not mixed with any other substance
2
Q
Formulation
A
A mixture that has been designed as a useful product and is formed by mixing together several different substances in carefully measured quantities to ensure the product has the required properties
3
Q
Mixture
A
Two or more substances mixed together, usually easy to separate
4
Q
Ways to separate mixtures
A
- Filtration
- evaporation
- crystallisation
- simple distillation
- fractional distillation
5
Q
Paper chromatography method
A
- use pencil to draw baseline bottom of C paper
- Use capillary tube placed concentrated spot of substance on baseline
- Place paper in beaker with solvent at bottom, ensure base line is above level of solvent
- Allow solvent to travel up paper
- When solvent is near top, take paper out, Mark level reached by solvent
- Leave able to dry
- dif. Components in mixture seen as spots
6
Q
What can the spot be sprayed with if they are colourless?
A
A chemical developing agent 
7
Q
Solvent Front
A
Level reached
8
Q
Potable water
A
Water that is safe to drink
9
Q
Three steps to make water potable
A
- Filtration
- Sedimentation
- Chlorination
10
Q
Desalination
A
Process of removing dissolved substances from seawater carried out by distillation
