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Chemistry EOY > C2.1.7 Purification And Checking Purity > Flashcards

C2.1.7 Purification And Checking Purity Flashcards

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1
Q

How can you tell if a substance is pure?

A

Using paper or TLC

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2
Q

Three advantages using TLC

A

It’s quicker
It’s more sensitive so a smaller sample can be used
Larger range of stationary phases and solvents to choose from

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3
Q

Separation method for insoluble and soluble substances

A

Dissolving followed by filtration

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4
Q

Separation method for a solute dissolved in a solvent (solution)

A

Crystallisation to obtain the solute, simple distillation to obtain the solvent

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5
Q

Separation method for two or more substances in the liquid state

A

Fractional distillation

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6
Q

Separation method for coloured soluble substances

A

Paper or thin layer chromatography

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Chemistry EOY (23 decks)

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