4. With, Coordination, complexes, the, of, chemistry, deals, study.

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5. atomic, studied, of, inorganic, The history, chemistry, structure, is, under.

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Task 6. Fill in the gaps using the words and word-combinations given below in the correct form. Translate the sentences.

contain, study, depend on, deal, common, refer, periodic table

1. There are many chemical life processes that _______ inorganic chemical processes.

2. Each group _______ some elements whose properties are similar to each other.

3. The blocks s, p, d and f are usually _______ separately.

4. The term "organic" has traditionally _______ only to animal or plant matter.

5. The _______ systematizes and rationalizes the chemical facts and helps in predicting new ones.

6. A branch of chemistry which _______ with the study of elements in the periodic table and their compounds, their physical and chemical properties is called inorganic chemistry.

7. Carbon is the main _______ element in organic chemistry.

Task 7. Write down the words you associate with the term “inorganic chemistry”. Compare your words with the words of your groupmates.

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Inorganic chemistry

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Task 8. Render the essence of each paragraph in one sentence. Use these sentences to present the summary of the text for your groupmates.

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III. Read the following text. What is the meaning of the words in bold? text b types of inorganic chemical reactions

Elements and compounds react with each other in numerous ways. Almost every inorganic chemical reaction falls into one or more of four broad categories.

I. Combination Reactions

Two or more reactants form one product in a combination reaction. An example of a combination reaction is the formation of sulfur dioxide when sulfur is burned in air:

S (s) + O₂ (g) --> SO₂ (g)

II. Decomposition Reactions

In a decomposition reaction, a compound breaks down into two or more substances.

Decomposition usually results from electrolysis or heating. An example of a decomposition reaction is the breakdown of mercury (II) oxide into its component elements:

2HgO (s) + heat --> 2Hg (l) + O₂ (g)

III. Single Displacement Reactions

A single displacement reaction is characterized by an atom or ion of a single compound replacing an atom of another element. An example of a single displacement reaction is the displacement of copper ions in a copper sulfate solution by zinc metal, forming zinc sulfate:

Zn (s) + CuSO₄ (aq) --> Cu (s) + ZnSO₄ (aq)

Single displacement reactions are often subdivided into more specific categories, e.g., redox reactions - chemical reactions which involve oxidation and reduction.

IV. Double Displacement Reactions

Double displacement reactions also may be called metathesis reactions. In this type of reaction, elements from two compounds displace each other to form new compounds. An example of a double displacement reaction occurs when solutions of calcium chloride and silver nitrate react to form insoluble silver chloride in a solution of calcium nitrate.

CaCl₂ (aq) + 2 AgNO₃ (aq) --> Ca(NO₃)₂ (aq) + 2 AgCl (s)

A neutralization reaction is a specific type of double displacement reaction that occurs when an acid reacts with a base, producing a solution of salt and water. An example of a neutralization reaction is the reaction of hydrochloric acid and sodium hydroxide to form sodium chloride and water:

HCl (aq) + NaOH (aq) --> NaCl (aq) + H₂O (l)

Remember that reactions can belong to more than one category. Also, it would be possible to present more specific categories, such as combustion reactions or precipitation reactions.

Tasks

Task 1. Practice in reading chemical formulas and equations in the text (see the rules in Appendix 4).

Task 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

Task 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.

Task 4. Look at the picture and comment on it from the point of view of chemistry.

Task 5. Watch the video 'Sulphuric Acid Production'. Decide if the sentences are true (T) or false (F).

1. Sulphuric acid is used in the drug production.
2. The small plant makes 60 tons of acid per day.
3. Sulphur is transported as a liquid around 200 degrees Celsius.
4. In the converter sulphur dioxide reacts with oxygen.
5. The catalyst is the most effective at 840 degrees Celsius.
6. About 95% of the original SO2 has been converted to SO3.
7. The acid concentration must be about 98% at the final stage.

Task 6. Explain the following words and word-combinations in English.

Reactant; product; breakdown; electrolysis; neutralization reaction; redox reaction.

Task 7. Make up the sentences of your own with the words in bold. Provide your own examples of combustion reactions and precipitation reactions.

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Task 8. Ask different types of questions to the text and answer your groupmates' questions.

Task 9. Prepare a report upon one of the following topics:

1. Inorganic chemistry as a science.

2. Differences and similarities between inorganic and organic chemistry.

3. Types of inorganic chemical reactions.

4. The Periodic table as the basis of inorganic chemistry.

Task 10. Study the web site www.sciencedaily.com and prepare a report or presentation on inorganic chemistry news. Share the information with the groupmates.