Английский язык: english for masters of chemistry
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- Project Work 7. Prepare a report upon one of the following topics: 1. Analytical chemistry as a science.
- I. Lead-in.
| pH range Nature
Color 0 - 3 Very acidic Red 3 - 6 Acidic Orange/Yellow 7 Neutral Green 8 - 11 Basic/base/alkali Blue 11 - 14 Very basic/base/alkali Purple Natural pH Indicator Red cabbage juice is one of the natural indicators which can be used to detect the pH of some domestic substances. The juice can be easily extracted. The neutral solution is purple colored and when it is mixed with lemon juice it turns red indicating that the lemon solution is acidic in pH. Ammonia in small quantities is observed in adulterated milk. This can be detected with red cabbage pH indicator which turns blue in this mixture. Detergent solution which is strong in basic medium turns the red cabbage pH indicator solution in to green color. Project Work 7. Prepare a report upon one of the following topics: 1. Analytical chemistry as a science. 2. Qualitative analysis. 3. Quantitative analysis. 4. Modern analytical chemistry. 8. Surf the Internet and prepare a report or presentation on the latest analytical chemistry news. Share the information with the groupmates. 37 I. Lead-in. 1. What topics does organic chemistry deal with? 2. What is the modern definition of organic chemistry? 3. What is the role of organic compounds in our life? 4. What types of organic reactions do you know? II . Read the text and find the answers to the questions above. TEXT A ORGANIC CHEMISTRY Organic chemistry is a chemistry subdiscipline involving the scientific study of the structure, properties, and reactions of organic compounds and organic materials, i.e., matter in its various forms that contain carbon atoms. Study of structure includes using spectroscopy and other physical and chemical methods to determine the chemical composition and constitution of organic compounds and materials. Study of properties includes both physical properties and chemical properties, and uses similar methods as well as methods to evaluate chemical reactivity, with the aim to understand the behavior of the organic matter in its pure form (when possible), but also in solutions, mixtures, and fabricated forms. The study of organic reactions includes both their preparation—by synthesis or by other means—as well as their subsequent reactivities, both in the laboratory and via theoretical (in silico) study. The range of chemicals studied in organic chemistry include hydrocarbons, compounds containing only carbon and hydrogen, as well as compositions based on carbon but containing other elements. Organic chemistry overlaps with many areas including medicinal chemistry, biochemistry, organometallic chemistry, and polymer chemistry, as well as many aspects of materials science. Organic compounds form the basis of all earthly life. They are structurally diverse. The range of application of organic compounds is enormous. They either form the basis of, or are important constituents of many products including plastics, drugs, petrochemicals, food, explosive material, and paints. Physical properties of organic compounds typically of interest include both quantitative and qualitative features. Quantitative information includes melting point, boiling 38 жүктеу/скачать 4.51 Mb. Достарыңызбен бөлісу:
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