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 flaska reflux condensera mechanical stirrera gas lead-in tubea water batha wash bottlea separatory funnela 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 = Nounsa 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= placewarm up = heat dehydrate, desiccate = dryto turn liquid to vapour by heating = distill Nounsa thing used to mix liquids = stirrera jet, a flow = streamkrak (srpski) = armthe total amount that is produced = yieldremainder, rest = residue

VOCABULARY DEVELOPMENT

Adjectiveswith three necks = crushed into fine powder = without water = quick, fast, sudden = zasicen (srpski) = Adverbone after another without a break =

VOCABULARY DEVELOPMENT

Adjectiveswith three necks = three-neckedcrushed into a fine powder = pulverizedwithout water = anhydrousquick, fast , sudden = rapidzasicen = saturated Adverbone 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