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Preparation of…

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.

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Preparation of…

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  1. Preparation of… Aims: to learn lab vocabulary

  2. 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.

  3. 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

  4. 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

  5. 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 =

  6. 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

  7. Vocabulary development • Adjectives with three necks = crushed into fine powder = without water = quick, fast, sudden = zasicen (srpski) = • Adverb one after another without a break =

  8. 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

  9. 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).

  10. 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.

  11. 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

  12. Word building • He begged her repeatedly to stop. • Do you believe in the existence of ghost? • Could you buy some more fertilizerfor 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.

  13. Collocations • crucial moment • express an interest • lab coat • get stuck • an eclipsed conformation • stick figures • a vodka shot • chop sticks

  14. 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?

  15. 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_________

  16. 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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