Учебно-методическое пособие по английскому языку для вузов. Кислякова Н.В - 9 стр.

UptoLike

ВУЗ: 

ВГУ | Воронеж

Составители: 

Рубрика: 

9
A solution is a class of mixtures in which individual molecules of
substances are distributed. The formation of a solution is a physical change.
Solution has two parts: solvent and solute. The solvent is the medium in which
some substances are dissolved. The solute is the substance dissolved in the
solvent. There are two kinds of substances: soluble that dissolve in a solvent and
insoluble that don`t dissolve in a particular solvent.Acids and bases are common
groups of compounds. An acid is a substance that releases hydrogen ions when
mixed with water. A base is a substance which separates in water forming ions
that react with hydrogen ions.
Follow-up activities
III. Reread the text ,correct or justify the following sentences.
1. Substances made from elements are called solids.
2. Chemical reaction is a process.
3. The formation of an acid is a physical change.
4. The solvent is the medium in which some substances are dissolved.
5. An acid is a liquid.
IV. Fill in each blank with the correct form of the words listed:
Solutio, chemical reaction, compounds, mass, key component, solvent,
represented, dissolved.
1. Matter is something that has ....
2. Each element is ... by a chemical symbol.
3. ... is the process by which elements react to form new compounds.
4. Water is a ... of cells and provides the medium.
5. A ... is a class of mixtures.
6. Solute is a substance ... in the solvent.
7. Acids and bases are two groups of ... that react in water.
8. Substances that do not dissolve in a particular ... are called insoluble.
V. Read and translate into Russian:
1. Each element is represented by a chemical symbol and has a set of properties
that distinguishes it from other elements.
2. Such substances made from elements combined chemically are called
compounds.
3. In some reactions the breaking of bonds absorbs more energy, in others the
breaking of bonds absorbs less energy.
4. Water is a key component of cells and provides the medium through which
nutrients enter and wastes exit a living cell.
5. There are two kinds of substances: soluble and insoluble. 
       A solution is a class of mixtures in which individual molecules of
substances are distributed. The formation of a solution is a physical change.
Solution has two parts: solvent and solute. The solvent is the medium in which
some substances are dissolved. The solute is the substance dissolved in the
solvent. There are two kinds of substances: soluble that dissolve in a solvent and
insoluble that don`t dissolve in a particular solvent.Acids and bases are common
groups of compounds. An acid is a substance that releases hydrogen ions when
mixed with water. A base is a substance which separates in water forming ions
that react with hydrogen ions.


Follow-up activities
III. Reread the text ,correct or justify the following sentences.
1. Substances made from elements are called solids.
2. Chemical reaction is a process.
3. The formation of an acid is a physical change.
4. The solvent is the medium in which some substances are dissolved.
5. An acid is a liquid.

IV. Fill in each blank with the correct form of the words listed:
   Solutio, chemical reaction, compounds, mass, key component, solvent,
   represented, dissolved.
1. Matter is something that has ....
2. Each element is ... by a chemical symbol.
3. ... is the process by which elements react to form new compounds.
4. Water is a ... of cells and provides the medium.
5. A ... is a class of mixtures.
6. Solute is a substance ... in the solvent.
7. Acids and bases are two groups of ... that react in water.
8. Substances that do not dissolve in a particular ... are called insoluble.

V. Read and translate into Russian:
1. Each element is represented by a chemical symbol and has a set of properties
that distinguishes it from other elements.
2. Such substances made from elements combined chemically are called
compounds.
3. In some reactions the breaking of bonds absorbs more energy, in others the
breaking of bonds absorbs less energy.
4. Water is a key component of cells and provides the medium through which
nutrients enter and wastes exit a living cell.
5. There are two kinds of substances: soluble and insoluble.



                                         9

Страницы