Simple Distillation
Click on the correct answer.
1
In general, what is the purpose of simple distillation?
to purify solid materials
to separate liquids from one another
to purify liquids
to purify dyes
to purify alcohol
2
An important part of the distillation apparatus that condenses vapor to a liquid is the
boiling round bottomed flask
stillhead
condenser
adapter
receiver
3
The distillate
is the material that is boiled
is the product of the distillation
is the hot vapor
is collected in the receiver
is the material that does not distill
4
The condenser is cooled by
water that goes in the uppermost point of the condenser
water that goes in the lowermost point of the condenser
hot vapor
distillate
the condenser is air-cooled
5
Which of the following are phase changes which occur in this demonstration:
boiling
vaporization
condensation
melting
freezing
6
Ethanol boils
at about 25 degrees Celsius
at about 37 degrees Celsius
at about 78 degrees Celsius
at about zero degrees Celsius
at about 100 degrees Celsius
7
The colored rhodamine
did not distill
did distill
stayed in the boiling flask
appeared in the receiver
8
When ethanol reaches 78 degrees Celsius
it liquifies since the intermolecular attractions are being interrupted
it melts since the intermolecular attractions are being interrupted
it freezes since the intermolecular attractions are taking hold
it boils since the intermolecular attractions are being interrupted
it condenses since the intermolecular attractions are taking hold
9
From the answers to the previous question it is apparent that
at the precise boiling point of a liquid only vapor exists
at the precise boiling point of a liquid only liquid exists
at the precise boiling point of a liquid both vapor and liquid coexist
at the precise boiling point of a liquid the intermolecular attractions between molecules are both being broken and formed
at the precise boiling point of a liquid the temperature will be 100 degrees Celsius
10
Since we have seen that at the boiling point both liquid and vapor co-exist, we can hypothesize about the melting point of any substance that
both liquid and vapor will co-exist
both solid and gas will co-exist
both solid and liquid will co-exist
it is really the same as the freezing point
it is really the same as the boiling point