lesson 4 simple distillation

Question 1

simple distillation consists of two stages which are what

Answer 1

first we evaporate the liquid by heating which turns the liquid into a vapour

then we condense the vapour back to a liquid by cooling

Question 2

what do we use to carry out simple distillation

Answer 2

an apparatus

Question 3

what do we do first in simple distillation

Answer 3

first we place our solution with the liquid and dissolved solid into the flask

Question 4

what is the flask connected to

Answer 4

a continuous glass tube

Question 5

the glass tube is surrounded by a jacket called the what

Answer 5

the condenser

Question 6

cold water from the tap continuously runs through the what

Answer 6

the condenser

Question 7

so the condenser does what

Answer 7

keeps the internal glass tube cold

Question 8

after running through the condenser (water) where does the tap water go

Answer 8

down the sink

Question 9

what is also apart of the apparatus

Answer 9

a thermometer

Question 10

what is the first step during simple distillation (after set up)

Answer 10

we start by heating the solution (eg Bunsen burner)

Question 11

as we heat the solution what occurs

Answer 11

the liquid starts to evaporate, turning into a vapour

Question 12

the vapour rises up the what

Answer 12

glass tube

Question 13

as the vapour passes over the thermometer what occurs

Answer 13

the thermometer reading increases

Question 14

usually with simple distillation, we heat the solution until it what

Answer 14

boils

Question 15

the vapour passes into the what

Answer 15

condenser

(remember condenser is cold)

Question 16

why is the condenser cold

Answer 16

as we’re circulating cold tap water around it

Question 17

the vapour entering the condenser causes what

Answer 17

the vapour to condense

Question 18

as the vapour condenses what occurs

Answer 18

it turns back into a liquid as it passes through the condenser

Question 19

where can we collect the liquid as the liquid passes through the condenser

Answer 19

the beaker

Question 20

at the end of simple distillation, what are we left with

Answer 20

crystals of our solid in the flask and our liquid in the beaker

Question 21

simple distillation can be used to produce what

Answer 21

drinking water from sea water

Question 22

Generally a great deal of energy is used to produce simple distillation so it is not often used for…

Answer 22

drinking water

(other techniques are used instead)

Question 23

what is simple distillation used for

Answer 23

to separate a liquid from a solid if we want to keep the liquid