Lesson 37&38_Preparation of

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PREPARATION OF…
Aims: to learn lab vocabulary
PREPARATION OF BENZYL CHLORIDE
Can you compare these instructions with
something from everyday life?
 Try to guess at least 5 words that will show up in
the text.
 Read the text quickly.
 Make a list of all the laboratory equipment you
can find in the text.
 Make a list of substances mentioned in the text.

Laboratory equipment:
a three-necked flask
a reflux condenser
a mechanical stirrer
a gas lead-in tube
a water bath
a wash bottle
a separatory funnel
a Claisen flask


Substances:
benzyl chloride
benzene
paraformaldehyde
zinc chloride
water
hydrogen chloride
bicarbonate
calcium chloride
magnesium sulphate
p-xylylene dichlorde
diphenylmethane
Laboratory equipment:
a three-necked flask =
trogrli balon
a reflux condenser =
uspravni kondenzator
a mechanical stirrer =
mehanicka mesalica
a gas lead-in tube = cev
za dovod gasa, uvodnik
za gas

a water bath = vodeno
kupatilo
a wash bottle =
ispiralica
a separatory funnel =
levak za odvajanje
a Claisen flask =
Klajzenov balon
VOCABULARY DEVELOPMENT
Verbs: Find the verbs with the following meaning.
put=
warm up =
dehydrate, desiccate =
to turn liquid to vapour by heating =
 Nouns
a thing used to mix liquids =
a jet, a flow =
krak (srpski) =
the total amount that is produced =
remainder, rest =

VOCABULARY DEVELOPMENT
Verbs: Find the verbs with the following meaning.
put= place
warm up = heat
dehydrate, desiccate = dry
to turn liquid to vapour by heating = distill
 Nouns
a thing used to mix liquids = stirrer
a jet, a flow = stream
krak (srpski) = arm
the total amount that is produced = yield
remainder, rest = residue

VOCABULARY DEVELOPMENT
Adjectives
with three necks =
crushed into fine powder =
without water =
quick, fast, sudden =
zasicen (srpski) =
 Adverb
one after another without a break =

VOCABULARY DEVELOPMENT
Adjectives
with three necks = three-necked
crushed into a fine powder = pulverized
without water = anhydrous
quick, fast , sudden = rapid
zasicen = saturated
 Adverb
one after another without a break = successively

WORDBUILDING
1. Into a 1-liter three-___________ (neck) flask,
equipped with a reflux __________ (condense), a
mechanical stirrer (_____________(prefer) of the
Hershberg type) and a gas lead-in tube, place
200g of dry benzene.
2. The level of water in the water bath is about the
same _______________ (high) as the __________
(react) mixture.
3. Transfer the reaction ______________ (mix) to a
_____________ (separate) funnel.
4. Distill under normal ___________ (press).
WORDBUILDING
1. Into a 1-liter three-necked flask, equipped with a
reflux condenser, a mechanical stirrer (preferably
of the Hershberg type) and a gas lead-in tube,
place 200g of dry benzene.
2. The level of water in the water bath is about the
same height as the reaction mixture.
3. Transfer the reaction mixture to a separatory
funnel.
4. Distill under normal pressure.
LAB HUMOUR
Phrasal verbs





to be on the point of doing sth = be about
perform, conduct = carry out
shout = cry out
turn up = show up
be tired or bored with sth = be fed up with
WORD BUILDING
He begged her repeatedly to stop.
 Do you believe in the existence of ghost?
 Could you buy some more fertilizer for the
garden?
 My surname has been misspelt – it’s not Static,
it’s Statkic.
 I remember meeting him, but I just can’t
visualize him.

COLLOCATIONS
crucial moment
 express an interest
 lab coat
 get stuck
 an eclipsed conformation
 stick figures
 a vodka shot
 chop sticks

HEALTH WATCH: THE GRADUATE STUDENT'S
GUIDE TO SELF-DIAGNOSIS AND TREATMENT.
According to the leaflet, what causes:
 … a pain in one’s legs
 … a burning feeling in one’s eyes
 … an inability to turn one’s head
 … a burning sensation on one’s head
 … giddiness?
FIND THE WORDS WITH THE SIMILAR
MEANING
lack = s________
d________
 help = a_______
 regular = f________
 try = a________
b________
 run away = e_______
 restrict = c_________
 bring upon yourself =
i________

come before = p______
 smell = s_______
 do = p________
 compensate for =
c____________
 vomiting = n_________

FIND THE WORDS WITH THE SIMILAR
MEANING
lack = shortage
deficiency
 help = aid
 regular = frequent
 try = attempt
bid
 run away = escape
 restrict = confine
 bring upon yourself =
incur

come before = precede
 smell = scent
 do = perform
 compensate for = catch
up on
 vomiting = nausea

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