Fractional Distillation And Paper Chromatography

Question 1

Miscible Describes Liquids that __________ in Each Other, Mixing Completely. Miscible Liquids have Different ___________ Points.

Answer 1

Dissolve…Boiling…

Question 2

It is Difficult to get ______ Liquids from Mixtures of Liquids with Similar Boiling Points by Simple ______________ as Vapour is Given Off from Each Liquid Before they Reach their Boiling Point.

Answer 2

Pure…Distillation…

Question 3

In Fractional Distillation, the ___________ Must Pass Over and Between the Glass Beads in the Fractionating Column Before they Reach the ______________.

Answer 3

Vapours…Condenser…

Question 4

Temperature in the Fractionating Column is __________ at the Bottom of the Column, Getting _________ as the Vapours Rise Up.

Answer 4

Highest…Lower…

Question 5

In a Fractionating Column, the Substance with the Highest ____________ Point will Condense More Readily on the Cooler Glass Beads Nearer the Bottom of the ___________, and Drip Back onto the Flask Underneath.

Answer 5

Boiling…Column…

Question 6

In a Fractionating Column, the Substance with the ________ Boiling Point will Continue __________ and Pass Over into the Condenser where it is Cool Enough to Turn Back into the Liquid State and be ____________.

Answer 6

Lower…Rising…Collected…

Question 7

How do you Test the Difference Between the Starting Mixture of Ethanol and Water?

Answer 7

By Applying a Splint to a Small Volume of Each in an Evaporating Dish.

Question 8

Is Ethanol a Flammable Liquid?

Answer 8

Yes, but not when Mixed with an Excess of Water.

Question 9

What Colour is the Flame After the Burning Ethanol is Present?

Answer 9

Clear Blue.

Question 10

Fractional Distillation is Used to Separate Ethanol From a Fermented ___________ in the Alcoholic Spirits Industry and in the Use of Ethanol as a ___________.

Answer 10

Mixture…Biofuel…

Question 11

What is Another Technique Used to Separate Substances From Mixtures in a Solution?

Answer 11

Paper Chromatography.

Question 12

Paper Chromatography Works Because Some _____________ in a Mixture Will Dissolve Better than Others in a ___________ Chosen.

Answer 12

Compounds…Solvent…

Question 13

Stages of Paper Chromatography?

Answer 13

• A Capillary Tube is Used to Dab a Spot of Solution on a Pencil Line Near the Bottom of the Sheet of Absorbent Chromatography Paper.
• The Paper is then Placed Standing in the Solvent at the Bottom of the Beaker or Tank.
• The Solvent is Allowed to Soak Up the Paper.
• The More Soluble a Substance is in the Solvent, the Further Up the Paper it is Carried.