1.Коли я приїхав до цього міста, цей театр будувався. 2.Це питання зараз

обговорюється на зборах. 3.Його слухали з такою цікавістю, що ніхто не

помітив, як я увійшов до кімнати. 4.Що будується на тому боці річки? 5.Я довго

не міг зрозуміти, чому над ним сміялися. 6.У нього було таке відчуття, ніби за

ним хтось іде. 7.Що пояснювали групі, коли ви до них приєдналися? 8.Не

заходьте без запрошення, в залі обговорюють дуже важливе питання. 9.–Що

там так обговорюють? – Здається, вчорашній фільм. 10.Завтра об одинадцятій

годині будуть виконувати вашу улюблену пісню. 11.-Коли було видано цю

книжку? – Її було видано в минулому місяці. Вона широко обговорюється зараз

у пресі. 12.Листи відправлялися поштою учора в цей час.

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Тема 17. Техніка хроматографії та обміну іонів

Мета: удосконалювати навички студентів правильно використовувати нову професійну лексику; розвивати логічне мислення; виховувати культуру мовлення. Удосконалення граматичних навичок вживання пасивного стану в часах групи Сontinuous

Обладнання: малюнки до теми, роздруківки текстів для читання та завдань, словники.

План заняття

І Організаційний момент. Привітання

ІІ. Читання тексту “Ion exchange methods in analytical chemistry ” з підручника В.Е. Коваленко «English»

Звертаючи увагу на наступні вирази : by “ ion exchange” we mean, of like sign, for such exchange to be possible

ІІІ. Закріплення комунікативних навичок

Прочитайте текст перекладіть українською мовою

LABORATORY

All the laboratories of inorganic chemistry are almost alike. These are large rooms where both students and research- workers carry out their experimental work. Modern laboratories of inorganic as well as organic and analytical chemistry are provided with gas and running water. Every laboratory is to be provided with a ventilating hood for the escape of both harmful and unpleasant vapours and odours. Every laboratory has to be lit up very well.

There are many laboratory benches with a great number of drawers in every laboratory. Different apparatus devices as well as materials are to be kept in them. Besides we can see many shelves and cases for containers with chemicals.

On every laboratory bench one can see test-tubes, flasks, beakers, funnels, evaporating dishes, weighing bottles. AH this glassware should be kept in good order.

Various burners serve for producing flames. Bunsen burner is to be mentioned among them.

Different crucibles are to be employed when heating of solution and igniting of materials are to be carried out. Crucibles are usually made of quartz, porcelain and iron. In addition to these crucibles, there are platinum crucibles in some laboratories, but they are used very seldom.

Every laboratory should be equipped with different kinds of apparatus. Everything in the laboratory is to have its definite place.

Ex. 1Дайте відповіді на питання

1. What do we call a laboratory? 2. In what laboratories can the students carry out their experiments? 3. What is every laboratory provided with? 4. Why is every laboratory provided with a ventilating hood? 5. What can you see on the shelves?

6. What glassware is there on every laboratory bench?

7. What are burners used for? 8. What are crucibles used for? 9. What are crucibles made of? 10. What is it necessary to do if we want to obtain hydrogen chloride? {describe the experiment) 11. How can nitric acid be prepared in the laboratory?

Ex. 2 Дайте відповіді на питання

Model: May I come into the laboratory? Yes, you may. No, you can't.

1. May he look through these documents? 2. May I take this test-tube? 3. May we use this glassware? 4. May she heat this substance?

Ex. 3 Знайдіть синоніми.

alike, nearly, different, similar, almost, various, employ, obtain, use, get.

Ex. 4 знайдіть антоніми.

large, inorganic, cool, small, organic, harmful, pleasant, often, useful, unpleasant, seldom, warm, heavy, tasteful, indefinite, light, testless, definite.

Ex. 5 Перекладіть речення.

1. The laboratory of general chemistry has many benches with a number of drawers. 2. A first-year student has to carry out a number of experiments in the laboratory of general chemistry. 3. This term the students have carried out a number of experiments. 4. These substances have very low solubility. 5. They have to find out the solubility of this substance. 6. They have found the solubility of this substance and now can investigate its properties better. 7. This metal has found wide application both in industry and in agriculture. 8. They have to raise the temperature greatly as the mixture doesn't boil. 9. Hydrogen peroxide has been heated.

10. Hydrogen peroxide has a lower vapour pressure than water.

11. The evaporation has to be carried out in the waterbath.

12. This crucible has been used for heating some solutions. 13.This solution has an unpleasant odour, he has to open the window. 14. A rombic sulphur has to be kept at a temperature of 96°C. 15. It is necessary to purify water, you will have to pass it through porous paper. 16. It has to be noted that chlorine dioxide reacts with water and yields a mixture of chlorous and chloric acid. 17. It has been already noted that hydrogen is found in the free state only in minute quantities.

Ex. 6 Перекладіть речення.

1. This substance is colourless and odourless. 2. Liquids which are not appreciably soluble in each other are called immiscible liquids. 3. Many new research institutes are being built in our country. 4. They are discussing a very important problem dealing with the development of new branches of chemistry. 5. The volume of an object increases when it is heated. 6. There is a large new laboratory in our Institute, 7. This experiment is to be carried out again, the results are wrong. 8. The meeting of our Chemical Society is to take place tomorrow at 5 o'clock. 9. He is to graduate from the Chemico-Technological Institute in 1988. 10. This solution was to be heated in a porcelain crucible. 11. The solution was heated and evaporated. 12. The glassware is to be washed very thorough­ly when the experiment is over

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