Ex. 6 Translate from English into Russian or Kazakh.
1. A solute is a solid which we are going to add to the acid.
3. The substance will not change its colour.
4. Who will identify the solute and solvent in a solution?
5. The molarity helps to determine the concentration.
6. I will prepare the solution of nitric acid.
7. I think the mole fraction is high in this solution.
8. I expect that my chemical species will react with this substance.
Ex. 7 Read and translate the text
How I am going to obtain magnesium oxide
Hello, my name is Sam. I am a teacher of chemistry. Next week I am going to obtain a chemical compound. I am going to obtain magnesium oxide. I am going to calcinate carbonates in a porcelain crucible. Decomposition is going to be at 300 oC and is going to complete at red heat:
MgCO3 = MgO + CO2
Decomposition will complete if the release of carbon oxide (IV) doesn’t take place during the interaction with muriatic acid.
Magnesium oxide will be of a white color. It is going to attract moisture from air. It is going to transform into hydroxide. I am going to keep it in the tightly-closed flask or vacuum-sealed ampoule. Magnesium oxide which I am going to calcinate at 1000 – 1200o C is going to be more stable.
Vocabulary
magnesium oxide – оксид магния
to obtain – получать
to calcinate - обжигать, кальцинировать
carbonate – карбонат
porcelain crucible – фарфоровый тигель
to complete – закончиться, завершиться
red heat – температура красного каления
decomposition – разложение
release – выделение
to take place – происходить
interaction – взаимодействие
carbon oxide – оксид углерода
muratic acid – хлороводородная кислота
to attract – притягивать
moisture – влага
tightly – closed flask – плотно-закрытая склянка
to keep – хранить
vacuum - sealed ampoule – запаянная ампула
stable – устойчивый
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