Subject:

Chemistry

Theme:

Types of chemical reaction

Grade:

8 “A”

Date:

«___»_______2017.

Time:

40 min

Location:

102 V

Number

Present:

10

Absent:

0

Goals:

Pupils know the types of chemical reactions, and their read and usage

Language objectives:

Pupils know terminologies such as composition, decomposition reactions, displacement and double displacement reactions. They can read reactions and translate terminologies this theme.

Expected results of the subject:

By the end of the lesson, the students will be able to:

1. know the types of chemical reactions

2. read chemical reactions

3. usage chemical reactions

Expected results of the language:

By the end of the lesson, the students will be able to:

1. will by heart know the types of chemical reactions

2. will know verbs related to the usage

3. will read chemical reactions

Necessary equipment:

Handout cards, slide, pictures, magnesium, calcium gluconate, lab.equipments,etc.

Additional resources:

Lesson procedure

Lesson stage

Tasks and Exercises

Notes

Greeting / warm-up:

1. Good afternoon students! How are you?

2. Who is absent today?

3. What date is it today?

Welcome to my lesson. Today it is chemistry.

Let’s start our lesson.

First, I want to show an experiment to you. We have already passed metals and non-metals and their properties. This is a magnesium. I have one question for you. What do you know about magnesium and its properties. (magnesium is shiny metal, easy to burn)

Ok. Now, I am burning it. Look carefully.

What did you notice?

-Right! It is completely burnt.

Look here! Another interesting experiment.

This is a calcium gluconate, we all know. Now, I will also burn it. We can say it completely burnt.

Tell me please, can we call this calcium gluconate? (NO, we can’t. what is it? It does not matter)

But now the question to you. What do you think our lesson today? What is the topic?

• Right! The topic todays lesson is types of chemical reactions. Write to the copy-book.

I will give you piece of paper. (You can get this piece of paper.)

Tell me please, what do you see? Who can say?

-Right! We can see chemical reactions and their name.

We can divide reactions in four main classes.

Now, you divide in two group. We can group decomposition and double displacement reactions both into one group. And others can be belong second group.

We will divide and continue our lesson.

Composition reaction:Mg + O₂ = MgO

Double displacement reaction: HCl + NaOH = NaCl + H₂O

Displacement reaction: Fe + CuCl₂ = FeCl₂ + Cu

Decomposition reaction: Cu(OH)₂ == CuO + H₂O

Decomposition reaction:Al₂O₃ = Al + O₂

Composition reaction:Ca + O₂ = CaO

Decomposition reaction:H₂O =H₂ + O₂

Composition reaction:H₂ + O₂ = H₂O

Double displacement reaction: Ca(OH)₂ + H₂SO₄ = CaSO₄ +H₂O

Displacement reaction: Mg + FeCl₂ = MgCl₂ + Fe

Presentation of the new topic:

We from this learnt that there are four types of chemical reactions. We can divide reactions in four main classes.

1. Composition reaction

2. Decomposition reaction

3. Displacement reaction

4. Double displacement reaction

Who can repeat to us these four types of chemical reactions again?

• Composition reaction

• Decomposition reaction

• Displacement reaction

• Double displacement reaction

Good job! Let’s continue our lesson. There are 4 types of chemical reactions, but today we will study only two types: composition and decomposition reactions.

Now, look at the screen.

H₂ + O₂ = H₂O

Ca + O₂ = CaO

Mg + Cl₂ = MgCl₂

Mg + O₂ = MgO

Cu + O2 = CuO

Al + Cl₂ = AlCl₃

All these reactions called composition. Why we called these reactions so? What do you think?

• Because we get one compound at the end.

H₂O = H₂ + O₂

HgO = Hg + O₂

Al(OH)₃ = Al₂O₃ + H₂O

Al₂O₃ = Al + O₂

CuO = Cu + O₂

These reactions called decomposition, because we get two compounds from one compound.

You understand the difference? Ok.

Let’s read these reactions.

Description of the tasks and exercises:

Task №1

Complete this table and read reactions.

KClO₃ → KCl + O₂, Ca(OH)₂ + HCl → CaCl₂ + H₂O,

Na + H₂O → NaOH +H₂, Zn + Cl₂ → ZnCl₂,

CaCO₃ → CaO + CO₂, C + O₂ → CO₂,

CaO + H₂O → Ca(OH)2, Zn(OH)₂ → ZnO +H₂O,

KMnO₄ → K₂MnO₄ + MnO₂ + O₂, Na + O₂ → Na₂O,

Fe(OH)₂ → FeO + H₂O, Mg + Br₂ → MgBr₂

I will give you 2 minute do this task.

Task №2

Write reactions difference.

Composition r, Similar, Decomposition r-s

And now we have a short break.

Stand up. Move your fingers. At the same time you’re moving your fingers, move your arms. Now move your shoulders and arms. Stop moving yours arms. Move one leg and then the other leg. Sit down again.

Let’s continue.

Now, you will do task №3

Copy and complete the sentences.

There are _______ types of chemical reactions.

If lithium reacts with ___________ form lithium oxide, this reaction called _____________________.

Lithium chloride is made from the elements ________ and ____________.

Copy and complete the sentences.

If you get one compound at the end reaction this called _______________.

If water ___________ to hydrogen and ____________, this reaction called _____________________.

Water consists are ___________ and _____________.

Match the word.

Correct mistakes in sentences.

There are two types of chemical reactions

Chemical reactions produce to physical changes

Hydrogen does not react with oxygen

Correct mistakes in sentences.

There are four types of change

Sugar in water is chemical changes

When hydrogen reacts with oxygen, we can produce carbon dioxide

Which statement about the reactions is correct?

1. Composition reactions are to produce two compound.

2. We can divide reactions in four main types.

Which statement about the reactions is correct?

1. When we get two compounds from one compound called composition reactions.

2. When compound consist two atoms of hydrogen and one atom of oxygen it is called water.

Input of new material on the subject content:

I used the 5 questions method and table with unknown data where children find the answers by communicating with each other and working in groups.

Home work

Read and by heart the new topic.