Separating Mixtures. Flashcards

1
Q

How would you separate insoluble and soluble substances?

A

Dissolving followed by filtration.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

How would you separate a solute dissolved in a solvent (a solution)?

A

Crystallisation to obtain the solute or simple distillation to obtain the solvent.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How would you separate two or more substances in the liquid state?

A

Fractional distillation.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

How would you separate coloured soluble substances?

A

Paper chromatography or thin-layer chromatography.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Why is TLC better than paper chromatography?

A

• it is quicker
• it is more sensitive, so a smaller sample can be used
• there is a larger range of stationary phases and solvents to choose from.
You can also scrape an individual spot from a thin-layer chromatogram for further analysis, for example by gas chromatography.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly