The measurements in chemistry Part a

1. Pronounce the following words:

between [bi'twi:n] sample ['sa:mpl]

balance ['bælƏns] microscope ['maikrƏskƏup]

calorimeter [,kælƏ'nmitƏ] lenses ['lenziz]

thermometer [θƏ'mכmitƏ] permit [pƏ'mit]

cylinder [`silindƏ] naked eye ['neikid 'ai]

burette [bjuƏ'ret] qualitative ['kwכlitƏtiv]

pipette [pi'pet] metric ['metrik]

volumetric [,vכlju'metrik] millimetre ['mili,mi:tƏ]

barometer [bƏ'rכmitƏ] micron ['maikrכn]

polarimeter [,poulƏ'rimitƏ] kilogram ['kilƏugræm]

refractometer [rifræk'tכmitƏ]

2. Read the following word combinations.

quantitative relationship

measuring devices

graduated cylinder

burettes for the measurements

extremely short

unit of mass

3. Read the following words, mind the stresses.

determine [di'tƏ:min] — determination [di,tƏ:mi'nei∫Ən]

microscope ['maikrƏskƏup] — microscopic [,maikrƏ'skopik]

measure ['meʒƏ] — measurement ['meʒƏmƏnt]

volume ['vכlju:m] — volumetric [,vכlju'metrik]

4. Translate the following sentences into Russian.

так как, поскольку

N ote: since

c, с тех пор, как, со времени

1. Since we know all the properties of the substance, we can use it in our experiment.

2. Many interesting investigations have been done since the foundation of this research laboratory at our plant.

3. Helium belongs to the same group as argon since it does not combine with other elements.

4. I have not carried out any experiments in the laboratory since I graduated from the Institute.

5. We couldn't finish our work since we had no necessary devices.

6. Since the kinetics of the reaction was studied at room temperature, the results were good.

7. This element has been known since the 19th century.

5. Translate the following sentences paying attention to the meanings of the word "order".

1. D. I. Mendeleyev arranged the elements in the order of increasing atomic weights.

2. In order to be used in a chemical laboratory natural water must be purified.

3. The order was announced at the meeting.

4. In order to dissolve this substance one must heat it.

5. The students must put everything in order when they finish their work.

6. In order to study the relationship between microstructural and mechanical properties of the gel, it is very important to use pure stable gels.

6. Give the Russian equivalents of the following words.

close relationship, exact measurement, quantitative analysis, necessary method, the order of arrangement.

7. Read the text and answer the following questions

1. What relationship exists between various kinds of matter?

2. What is the chemist to do if he wants to understand the quantitative relationships between various kinds of matter?

3. What does the chemist use balances for?

4. When does the chemist use a calorimeter and thermometer?

5. What is it necessary to use in order to measure volumes?

6. What devices do the analytical and physical chemists use?

7. What device does the chemist use if he wants to examine very small samples of matter?

8. What is the fundamental unit of the metric system?

9. When can the micron be used?

10. What is the unit of volume?

11. What is the unit of the heat measurement?