clcctrons in the shared clcctron pair as belonging to both atoms. 7. Wc
usually think of a substancc as being in a certain physical state. 8. Solutions
arc often thought of as being liquids. 9. They watched the sugar crystals
disappearing in water. 10. Lavoisier considered oxygen as being a
constituent o f all acids. 11. After Dalton wc find the atomic theory
developed rather than rejected. 12. The inertness of the noble gases is
accounted for by the fact that they have all their shells completely filled.
13. Wc had our laboratory equipped by the beginning o f a new academic
year. 14. Wc saw the solution turning blue as the reaction proceeded.
15. They observed the temperature slowly rising.
Ex. 10. Translate the sentcnccs into English.
1. Все химические реакции происходят с различной скоростью.
2. Скорость реакции зависит от состава реагирующих веществ и ус
ловий реакции. 3. Существует множество факторов, которые оказы
вают влияние на реакцию. 4. Среди них прежде всего следует на
звать температуру, концентрацию, наличие катализаторов и другие.
5. С точки зрения молекулярной кинетики легко объяснить влияние
температуры. 6. Иногда скорость реакции в значительной степени
зависит от присутствия катализатора.
Ex. 11. Answer the following questions:
1. What reactions procccd fast? 2. What reactions arc usually slow?
3. In what way is silver chloride formed? 4. What example o f oxidation-
rcduction reaction can you give? 5. What factors influence the reaction
rate? 6. In what way can one classify these factors?
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