1. Practice in reading chemical formulas and equations in the text (see the rules in Appendix 4).
2. Each column contains a category and some terms listed under it. Cross out the term that does not fit in each category.
Type of inorganic reaction |
Inorganic compounds |
Soluble substances |
decomposition |
sulfur dioxide |
copper sulfate |
combination |
sodium chloride |
zinc sulfate |
esterification |
silver chloride |
sodium hydroxide |
single displacement |
sodium citrate |
sodium chloride |
double displacement |
hydrochloric acid |
silver chloride |
3. Define the type of inorganic chemical reaction.
Equation |
Type of reaction |
2KMnO4 = K2MnO4 + MnO2 + O2 |
|
CaO + CO2 = CaCO3 |
|
Zn + 2HCl = ZnCl2 + H2 |
|
BaCl2 + H2SO4 = BaSO4 + 2HCl |
|
Pay attention to the names of the reactants:
Zn – zinc
|
O2 – oxygen
|
HCl – hydrochloric acid
|
BaCl2 – barium chloride
|
KMnO4 - potassium permanganate
|
CaO – calcium oxide
|
K2MnO4 - potassium manganate
|
H2SO4 – sulphuric acid
|
ZnCl2 – zinc chloride
|
CO2 – carbon dioxide
|
MnO2 – manganese oxide (IV)
|
BaSO4 – barium sulphate
|
H2 – hydrogen
|
CaCO3 – calcium carbonate
|
Practice in reading these names. Read out them to your groupmates.
4. Look at the picture and comment on it from the point of view of chemistry.
5. Read the following words and word-combinations.
fertilizers |
rayon |
petroleum refining |
battery acid |
pickling (cleaning) iron |
impurities |
Replace the words in Russian with the words and word-combinations above. Translate the text.
Uses of sulphuric acid
Sulphuric
acid is one of the most important industrial chemicals. More of it is
made each year than is made of any other manufactured chemical. It
has widely varied uses and plays some part in the production of
nearly all manufactured goods. The major use of sulphuric acid is in
the production of удобрений,
e.g., superphosphate of lime and ammonium sulfate. It is widely used
in the manufacture of chemicals, e.g., in making hydrochloric acid,
nitric acid, sulfate salts, synthetic detergents, dyes and pigments,
explosives, and drugs. It is used in очистке
нефти
to wash примеси
out of gasoline and other refinery products.
Sulphuric acid is used in processing metals, e.g., in травлении iron and steel before plating them with tin or zinc. Вискоза is made with sulfuric acid. It serves as the electrolyte in the lead-acid storage battery commonly used in motor vehicles (acid for this use, containing about 33% H2SO4 and with specific gravity about 1.25, is often called аккумуляторной кислотой).