TIỂU LUẬN môn DẠY HỌC HÓA HỌC BẰNG TIẾNG ANH, SOẠN 1 GIÁO án DẠY HỌC BẰNG TIẾNG ANH

BỘ GIÁO DỤC VÀ ĐÀO TẠO
TRƯỜNG ĐẠI HỌC VINH
-----------------

HỌC VIÊN: NGUYỄN TRUNG QUÂN

Tiểu luận
CHUYÊN ĐỀ
PHƯƠNG PHÁP DẠY HỌC HOÁ HỌC BẰNG
TIẾNG ANH Ở TRƯỜNG THPT

Chuyên ngành: Lí luận và Phương pháp dạy học bộ mơn Hóa học
LỚP CAO HỌC 27 (Vinh)


Lesson 29:

OXI – OZON

I.
OBJECTIVES
1. Knowledge is required.
- Know the position and configuration of the outermost layer of
eletron; Physical properties, chemical properties, natural state,
application of oxygen; Method of oxygen preparation in
laboratories and in industry.
- Understand the cause of oxygen being a strong nonmetallic; very
strong oxidizing (oxidizing most metals (except Au, Ag, Pt ...),
nonmetals (except for halogens), many organic inorganic
compounds).
- Complete application of chemical equations on the chemical and

preparation properties of oxygen.
- Know ozone is oxidant and understand the oxidation of ozone is
stronger than the oxygen.
2. Skill is required.
- Predict, test and conclude about the chemical properties of oxygen
through structural characteristics and reactions, illustrated
experiments.
- Developing the capacity of the content research group operation;
contact the reality to understand the role and application of oxygen
with science and technology and life from which propose measures
to protect the environment.
- Developing observation and visual competence to grasp and apply
knowledge to specific issues.
- Applying knowledge and thinking to complete chemical equations
illustrating the chemical properties and preparation of oxygen.
- Get an overview of ozone, about its properties and its role in
science and technology and life.
II.
VOCABULARY
Tiếng Việt

Tiếng Anh

Tiếng Việt

Tiếng Anh

Trạng thái

Status

Chất khí

Gases

Phi kim

Non-Metallic

Oxi hóa

Oxidant

Độ âm điện

Acoustic power

Hầu hết

Most


Vơ cơ

Inorganic

Hữu cơ

Organic

Kim loại

Metal

Dự đốn

Predict

Quan sát

Phenomenon

Kiểm tra

Check

Hiện tượng

Phenomenon

Phản ứng

Response

Quan sát

Observe

Vai trị

Role

Sự cháy

The fire

Sự sống

The Life

Độ tan

Solubility

Bảo vệ

Protect

Vị trí

Location

Cấu tạo

Structuring

Ngun tử

Atomic

Phân tử

Molecules

Khơng màu

Colorless

Khơng mùi

Odorless

Hóa lỏng

Liquefaction

Khơng vị

Not taste

Tác dụng

Effects

Trình bày

Presented

Ứng dụng

Application

Điều chế

Institutional

Chưng cất

Distillation

Phân đoạn

Segment

III.

EXPRESSIONS
Tiếng Anh

Tiếng Việt

oxygen in life on earth

oxy trong cuộc sống trên trái đất

environmental protection measures

Các biện pháp bảo vệ môi trường

exists in molecular form

tồn tại ở dạng phân tử

Little soluble in water

Ít tan trong nước

Effects are many non-metallic

Tác dụng được nhiều phi kim

Most metal effects

Tác dụng hầu hết kim loại

Effects on compounds

Tác dụng với hợp chất

Has strong oxidant

có tính oxi hóa mạnh

In the lab

Trong phịng thí nghiệm

Decomposition Heat

nhiệt phân hủy

Oxygen-rich compounds

hợp chất giàu oxi

Less heat-resistant

kém bền nhiệt

In industry

Trong công nghiệp


Liquid Air

Khơng khí lỏng

Water-feces

Điện phân nước

Dilute air

Khơng khí lỗng

The higher the

Càng lên cao

System Chemistry

Hệ thống hóa

IV.

PLAN OF TEACHING

Activity 1: (5 minutes)
Start the lesson.
Show students videos of the role oxygen plays on life on earth.
Purpose: 1) Students see the role of oxygen in life on earth.
2) Students propose environmental protection measures.
3) Go to post.
Activity 2: (20 minutes)
New post activity.
Class divided into 4 groups of content research teachers assigned.
GROUP 1: Research and present content about the location, structural
characteristics and physical properties of oxygen.
Teacher and student Activities
Knowledge to meet
- Teachers organize, track and instruct
A. OXI
students to discuss content research I. LOCATION AND STRUCTURE
groups.
- Location, atomic structure
- Students discuss content research groups
Location
8th Box
under the guidance of teachers.

VIA Group
- Teachers for students see BTH.
Cycle 2
Electron
configuration
of
2
2
4
oxygen:1s 2s 2p
⇒ The oxygen has 6e outer layer.
- Molecular structure: oxygen exists in
molecular form
gg

Determine the location of the oxygen.

gg

: O : : O : 
→ O = O 
→ O2

II. PHYSICAL PROPERTIES
- Colorless and odorless gases; Sustain


life, fire and.
d=

32
≈ 1,1
29

- Slightly heavier than air.
times.
- tliquefied = -1800C.
- Little soluble in water.
GROUP 2: Study and present content on the outermost characteristics, electrical
tones and chemical properties of oxygen.
- Teachers organize, track and instruct III. CHEMICAL PROPERTIES
students to discuss content research - The oxygen has 6e overchilled.
groups.
- There is a power sound = 3.44 (only
Students discuss content research lost Flo).
groups under the guidance of teachers.
⇒ Oxygen has a strong oxidant.
1. The effect with metals.
- Teacher for laboratory Viewer: oxygen Most metal-excluded effects: Au, Ag,
effects with Fe (when students present Pt...
0
0
+2 −2
content).
t
0

2 Mg + O 2 
→ 2 Mg O
0

0

0

+8/3 −2

t
3Fe + 2 O 2 
→ Fe3 O4

- Teacher for HS Video watch: Oxygen effects
with sulfur (when students present content). 2. The effect with non-needle.
Effects are multiple non-metallic
(except halogen)
+4 − 2
- Teachers give HS video experiments: 0 0
t
S + O 2 
→ S O2
Oxygen effects with C2H5OH (when students 0 0
+4 −2
t
C + O 2 
→ C O2
present content).
0

0

3. Effects on compounds
The effect with many inorganic and
organic compounds.
0

0

+4 − 2

0

−2

t
C2 H 5OH + O 2 
→ 2 C O2 + 3 H 2 O
+2

0

0

+4 −2

t
2 C O + O 2 
→ 2 C O2

⇒ The oxygen conclusion is sharply
oxidant.

GROUP 3: Researching and presenting content on the application and mechanism of
oxygen.
Teachers organize, track and instruct IV. APPLICATION


students to discuss content research
groups.
Students discuss content research
groups under the guidance of teachers.
V. INSTITUTIONAL
- Teacher for watch video test: oxygen
1. In the laboratory.
processing (when the student presents
- Principles: Heat destroys oxygencontent).
rich compounds and poor heat like:
KClO3 (solid), KMnO4 (solid)...
0

t
2 KMnO4 
→ K 2 MnO4 + MnO2 + O2 ↑

- Teachers give HS simulation video
MnO ,t
→ 2 KCl + 3O2 ↑
experiments: oxygen production (when 2 KClO3 
students present content).
2. In industry.
- From the air: distilled liquid air
segmentation, oxygen collection at1830C.

From
water:
water-feces.
2

0

electrolysis
2 H 2O 
→ 2 H 2 ↑ +O2 ↑

GROUP 4: Researching and presenting content on the nature and role of
ozone.
- Teachers organize, track and instruct
students to discuss content research
groups.
Students discuss content research
groups under the guidance of teachers.

B. OZON
1. Physical properties
- Is a light blue, characteristic odor.
- tliquefied = -1120C
- Tan trong nước nhiều hơn oxi.
2. Chemical properties
- Ozone has a very strong oxidation,
which is stronger than oxygen. Oxidation
of most metals (except Au, Pt), nonmetallic, many organic inorganic
compounds.
- Often, ozone reacts with silver to form

silver oxide.
2Ag + O3 → Ag2O + O2
3. Ozone in the wild
- The ozone is concentrated in the upper
atmosphere, from the ground 20 – 30 km.


- In natural ozone formed by ultraviolet
rays.
3O2 Ultraviolet rays2O3

Activity 3: (8 minutes)
Expand.
Student guidance Teacher explains 1 issue number:
Problem 1: When raising the aquarium, people often use a aeration set. What is the
significance of the aeration?
Problem 2: When the climb, the air is dilute. What does "dilute" mean? Why is there a
phenomenon?
V.

WORKED EXAMPLES

Activity 4: (7 minutes)
To operate, strengthen knowledge.
Teachers who instruct students to use and strengthen their
Question 1: The oxygen element has an atomic number of 8. The position of the
oxygen in the periodic table of chemical elements is
A. Cycle 3, VIA group.

B. Cycle 2, VIA Group

C. Cycle 3, group IVA.

D. Cycle 2, group IVA.

Question 2: The chemical characteristic of oxygen element is
A. Strong oxidant Properties.
C. Weak oxidation properties.
properties.

B. Strong calculation.
D. Moderate oxidation and reducing

Question 3: In the laboratory, it is prepared by the
A. Water-feces.
C. KClO3 catalytic Heat MnO2.

B. Thermo-Fertilizer (NO 3)2
D. Fractional distillation of liquid air segments.

Question 4: The sequence of substances all effects on oxygen is


A. Mg, Al, C, C2H5OH

B. Al, P, Cl 2, CO

C. Au, C, S, CO

D. Fe, Pt, C, C 2H5OH

Question 5: The complete combustion of 17.4 grams of Mg and Al mixture in
oxygen (residual) is obtained 30.2 grams of composite oxide. The volume of
oxygen gas (standard conditions) involved in the reaction is
A. 17,92 liter.

B. 8,96 liter.

C. 11,20 liter.

D. 4,48 liter.

Tutorial
Conservation of mass: nO2 = (30,2 - 17,4)/32 = 0,4 (mol)⇒ V = 0,4. 22,4 = 8,96 (liter)
HOMEWORK(5 minutes)

VI.

- Do the following exercises:
Question 1: Add 3 grams MnO2 to 197 grams of mixture X including KCl
and KClO3. Mix thoroughly and boil the mixture to the reaction
completely, obtained weight solids 152 grams. The KCl volume in 197
grams X is
A. 74,50 gam.
37,25 gam.

B. 13,75 gam.

C. 122,50 gam.

D.

Question 2: Burns completely 3.6 grams of metal M (have a unchanged
chemotherapy in the compound) in CL2 and O2 gas mixtures. After the
response 11.5 grams of solids and volume of gas mixtures responded to
2.8 liters (standard conditions). Metal M is
A. Be

B. Cu

C. Ca

D. Mg

-

Refresher, system of oxygen knowledge. Do the exercises in textbooks
page 127, 128.

-

View and compose post content: SULFUR.


REFERENCE MATERIAL

1. (Eds.), Tran Trung Ninh (2018) Methods of teaching chemistry in English High school.
Vinh University Publishing Office.

2. High-distance (2019). Teach some chemistry-themed lessons in English.

Education Publishing.
3. Textbook of Chemistry 10th grade – Education Publisher.
4. A guide to implementing the skills of Chemistry grade 10 – Educational
publisher.
5. Textbook of Chemistry 10 – Educational Publisher.


LESSON: ALCOHOLS
A. OBJECTIVES
By the end of the lesson student will be able to:
1. Define what alcohol is
2. Name the alcohol
3. Determine the structure of the alcohol and identify the functional group of alcohol
4. Describe the physical and chemical properties of alcohol
5. Describe the principles and methods of producing alcohol by fermentation
6. Apply alcohol oxidation reaction in your life
B. VOCABULARY
Tiếng Anh
alcohol
homologous
series
functional group
hydroxyl
general formula
nomenclature
molecular formula

Tiếng Việt
alcohol

Tiếng Anh
physical properties

Tiếng Việt
tính chất vật lí

dãy đồng đẳng

solubility

độ tan

nhóm chức
hiđroxyl
cơng thức tổng qt
danh pháp
cơng thức phân tử

boiling point
very soluble
slightly soluble
bacteria (số nhiều)
liquid

structural formula

công thức cấu tạo

full
structural

formula
petrol
oxidation
water vapour
excess

cơng thức cấu tạo
đầy đủ
xăng, dầu
phản ứng oxi hóa
hơi nước
dùng dư

soot

muội than

điểm sơi
tan tốt
tan ít
vi khuẩn
chất lỏng
tính chất hóa
chemical properties
học
alkali

kiềm

combustion

carbon dioxide
oxygen
clean fuel
potassium
dichromate

phản ứng cháy
cacbon đioxit
oxi
nhiên liệu sạch

H2SO4 loãng

ethanoic acid

axit axetic

ống kiểm tra độ cồn
vi sinh vật
đường

beverage
starch
glucose

enzyme

men

biological catalyst

mixture

hỗn hợp

fractional
distillation

alcoholic drink

đồ uống có cồn

fermentation

nước giải khát
tinh bột
glucozơ
xúc tác sinh
học
chưng cất phân
đoạn
q trình lên
men

dilute sulphuric
acid
breathalyser
microorganism
sugars

C. EXPRESSIONS

kali đicromat


acyclic saturated monoalcohol
to be soluble/insoluble in...
to be responsible for
at room temperature
at standard temperature and pressure (s.t.p.)
to take part in
to burn in air
to be produced = to be formed
to be oxidized
to be reduced
to be broken down to
to be kept tightly corked
to be (left) exposed to air

alcohol no đơn chức mạch hở
tan/không tan trong...
gây ra bởi
ở nhiệt độ phòng
ở điều kiện tiêu chuẩn
tham gia (phản ứng)
cháy trong khơng khí
được tạo ra
bị oxi hóa
bị khử
bị phân hủy thành

được nút chặt
được để ra ngồi khơng khí

D. PLAN OF TEACHING
CONTENT
TEACHING ACTIVITIES
What are alcohols?
Activity 1. Learn about
In the previous lesson, you studied two homologous series and
homologous series: the alkanes and alkenes. The structure of alcohol
alcohols are another homologous series.
GV tổ chức hoạt động nhóm
• Alcohols are organic compounds which tìm hiểu về định nghĩa, dãy
have the hydroxyl (-OH) functional đồng đẳng và cấu tạo của
groups connecting directly to their alcohol. Một số câu hỏi thảo
luận:
saturated carbon atoms.
Q1. How is alcohol defined?
H
H
H
Q2. What is the functional
All alcohols have
C
C
C
O H
this functional group group of alcohol?
H
H

H
Q3. How is the structure of
• Structural and molecular formula of alcohol?
Q4.
Who
can
draw
ethanol:
structural and molecular
formula of ethanol?

What is the general formula of acyclic Activity 2. Determine the
saturated monoalcohols?
general formula of alcohol
All alcohols contain the elements carbon, GV gợi ý HS nhận xét về
hydrogen and oxygen. They have the general thành phần các nguyên tố có
formula CnH2n+1OH.
mặt trong alcohol từ đó tìm
ra cơng thức tổng qt của


alcohol no đơn chức mạch
hở.
Nomenclature of Alcohols
Activity 3. Introduction of
The name of an alcohol ends with ‘-ol’. Hence, alcohol naming rules
an alcohol that contains two carbon atoms is GV giới thiệu quy tắc gọi
called ethanol. The fist three alcohols in the tên của alcohol no đơn chức
homologous series are given below.
mạch hở. Sau đó hướng dẫn

các nhóm HS thực hành gọi
tên một số alcohol theo
bảng sau.

Name
Molecular formula
Structural formula
Full structural formula
Methanol
CH3OH
or
CH4O
CH3OH
H
H

O H

C
H

Ethanol
C2H5OH
or
C2H6O
CH3CH2OH
H

H

H

C

C

H

H

O H

Propanol
C3H7OH
or
C3H8O
CH3CH2CH2
H


H

H

H

H

C

C

C

H

H

H

O H

Physical Properties of Alcohols
Activity 4. Introduction of
The Table below shows the physical states, physical
properties
of
solubilities and boiling points of some alcohols. alcohols
GV chuẩn bị các mẫu vật của
Physic Solubility
Boiling
Alcohol
o
al state in water point ( C) một số alcohol đầu dãy đồng
Methano
very
đẳng, cho HS quan sát trạng
liquid
65
l

soluble
thái của chúng và nêu nhận
very
xét. Sau đó làm thí nghiệm để
Ethanol
liquid
78
soluble
nhận xét về độ tan trong nước
Propanol liquid
soluble
97
của các alcohol này. Tổ chức
slightly
Butanol
liquid
118
các hoạt động cho HS dự đốn
soluble
• Alcohols are soluble in water, but their sự thay đổi nhiệt độ sôi
solubility decreases as the molecular size của các alcohol và rút ra quy
increases. For example, methanol is very luật thay đổi đó.
soluble in water but butanol is only
slightly soluble in water.
• Unlike the alkanes and alkenes, the first
four alcohols are liquids at room
temperature.
Chemical Properties of Alcohols
Activity 5. Introduction of
• Although alcohols contain the -OH chemical properties of

group, they are not alkalis. In fact, they alcohols
GV tổ chức hoạt động nhóm
are all neutral.
• Alcohols are more reactive than alkanes cho HS trả lời các câu hỏi:
because the C-O and O-H bonds in Q1. Is the functional group (alcohols are more reactive than the C-C OH) basic property?
Q2. Compare the polarization
and C-H bonds in alkanes.


• The functional group (-OH) of alcohols of the C-O and O-H bonds in
is responsible for the typical reactions alcohol with the C-C and C-H
bonds in the alkane.
that alcohols undergo.
• All alcohols have similar chemical Q3. Considering the role of
properties. Alcohols can take part in the OH-group, how does it
the
chemical
these
reactions:
combustion
and influence
properties of the alcohol?
oxidation.
Combustion
Like most other organic compounds, an alcohol
such as ethanol burns in air to produce carbon
dioxide and water vapour.

Activity 6. Learn about
combustion of alcohol

GV hướng dẫn HS đốt cháy
ethanol:
heat
Q1. Observe the flame and


→
ethanol + oxygen
carbon dioxide +
draw comments.
water vapour
Q2. Write the chemical
heat


→
C2H5OH (l) + 3O2 (g)
2CO2 (g) + 3H2O equation
of
combustion
(g)
reaction.
The combustion of alcohols in excess oxygen
produces a clean flame, as only carbon dioxide
and water vapour are produced.
How is the combustion of alcohols useful to Activity 7. Learn about
us?
application
of
the

Alcohols can be used as a fuel. In fact, some race combustion of methanol
cars run on methanol. Methanol is less volatile GV sử dụng phương pháp
than petrol and is less likely to explode in an đóng vai, tạo tình huống giả
accident. Methanol is also a clean fuel. It does định, HS vào vai nhà khoa
not produce soot on combustion. Vietnam relies học khảo sát khách hàng sử
heavily on petrol as a fuel. Do you think it is dụng xăng sinh học E5
good to use alcohol as a fuel instead?
methanol làm nhiên liệu thay
Alcohol is also burnt on some foods such as thế xăng RON 92 ở Việt Nam.
fruit cake to give it a distinct flavor.

Sau đó hướng dẫn HS thảo
luận rút ra các nhận xét.
Oxidation
Activity 8. Learn
Alcohol are easily oxidised. For example, in the oxidation of alcohol

about


laboratory, we can oxidise ethanol by heating it
with a mixture of potassium dichromate (VI)
solution (K2Cr2O7) and dilute sulphuric acid.
Ethanol then becomes ethanoic acid.

ethanol + oxygen from oxidizing agent
ethanoic acid + water
HH
H C C O H + 2[O]
HH

HO

H HO H H

HO H H

HO

HH

H C C O H + H2OH C O H +2[O] H C OH +H2O C OC H +2[O] HC OC H + H2OH C C O H + 2[O] H C C O H + H2OH C C O H + 2[O]
H

H H HH

H HH

H

HH

HO

→

H HO H H

HO

H C C O H + H2OH C O H +2[O] H C OH +H2O C OC H +2[O] HC OC H + H2O
H

H H HH

Sử dụng phương pháp bàn tay
nặn bột, GV hướng dẫn HS
thực hành thí nghiệm oxi hóa
ethanol bằng hỗn hợp dung
dịch K2Cr2O7/H2SO4. Yêu cầu
HS rút ra các nhận xét:
• Role of ethanol and K2Cr2O7
/ H2SO4 solution in the
experiment.
• Color change of the K2Cr2O7
agent during the reaction.
• Predict the product.
• Write reaction diagrams.

H

In this redox reaction
a) ethanol acts as a reducing agent while
acidified potassium dichromate (VI) acts as a
oxidizing agent.
b) potassium dichromate (VI) is reduced. Its
colour changes from orange to green.
c) ethanol is oxidized to ethanoic acid. Ethanoic
acid is an example of a carboxylic acid. You
will learn about carboxylic acids in the next

section.
How is the oxidation of alcohols useful for
us?
In Vietnam, the police use breathalysers to test
the amount of alcohol consumed by drivers. A
brethalyser contains acidified potassium
dichromate (VI). If the breath of a driver
contains a high level of alcohol, a colour change
is registered on the device.

Activity 9. Learn about
application of the oxidation
of alcohols
GV giới thiệu nguyên tắc của
thiết bị đo nồng độ cồn mà
cảnh sát giao thông thường sử
dụng để xác đinh nồng độ cồn
của các lái xe, yêu cầu HS
hiểu cơ chế hoạt động của
thiết bị này.


Producing Ethanol by Fermentation
To most people, alcohol refers to beverages like
wine and beer. Actually, such drinks contain
ethanol. To produce ethanol, we ferment fruits,
vegetables or grains.
What is fermentation?
Fermentation is a chemical process in which
microorganisms such as yeast act on

carbohydrates to produce ethanol and carbon
dioxide. Sugars and starch are examples of
carbohydrates.
Yeast contains enzymes (biological catalysts)
which cause starch or sugar to break down to
glucose. The glucose is then broken down to
ethanol and carbon dioxide.
A glucose solution is mixed with yeast and the
mixture is kept at a temperature of about 37 0C.
Ethanol and carbon dioxide are produced after a
few days.
glucose solution

yeast

→

ethanol + carbon

yeast

→

dioxide C6H12O6 (aq)
2C2H5OH (aq) +
2CO2 (g)
The enzymes in yeast work best at around 37 0C.
If the temperature is above 370C, the enzymes
will die and fermentation stops.
The fermentation of sugar produces only a

dilute solution of ethanol (up to about 15%).
This is because when the alcohol content
exceeds this value, the yeast dies and
fermentation stops. Ethanol can be obtained
from this liquid mixture by fractional
distillation.
In many countries, ethanol is manufactured by

Activity 10. Learn about
producing
ethanol
by
fermentation
GV chuẩn bị trước cho các
nhóm HS thiết kế dự án học
tập “Producing Ethanol by
Fermentation”. Sau đó cho
các nhóm trình bày và hướng
dẫn HS thảo luận. Chú ý nhận
xét nội dung và phong cách
trình bày và đánh giá cho
điểm sản phẩm của các nhóm
một cách chính xác, cơng
bằng.


the fermentation of cane sugar. During
fermentation, the sucrose (C12H22O11) in the
cane sugar is first converted to glucose, and
then to ethanol and carbon dioxide. This ethanol

is used as a fuel in cars!
What happens if alcoholic drinks are left
exposed to air?
If an alcoholic drink such as wine or beer is left
exposed to the air, it will turn sour after a few
days. This is caused by the action of bacteria
from the air. Using oxygen from the air, the
bacteria oxidizes ethanol into ethanoic acid.

Activity 11. Learn about
alcoholic drinks
GV tổ chức cho HS thảo luận
nhóm:
Q1. Why alcoholic beverages
when exposed to air after a
few days will turn into sour?
bacteria
Q2.
How
to preserve
→
ethanol + oxygen from air
ethanoic
alcoholic beverages so that
acid + water
they are not sour?
bacteria

→
C2H5OH (aq) + O2 (g)

CH3COOH
(aq) + H2O (l)
It is therefore important that wine is kept tightly
corked. This is also the reason why, when we
are fermenting sugars to produce alcohol, it is
important to ensure that fermentation takes
place in the absence of air. Otherwise, the
alcohol will be oxidized to form an acid called a
carboxylic acid.
Activity 12. Consolidate the
lesson
GV tổ chức trị chơi cho HS
bốc thăm từ khóa (các thuật
ngữ quan trọng trong bài) và
giải nghĩa từ đó bằng tiếng
Anh nhưng khơng được đọc
từ đó sao cho các bạn trong
lớp nói chính xác từ khóa đó
thì người chơi sẽ được ghi
điểm. Thời gian mỗi lần chơi
không quá 2 phút. Với bài
học này, GV có thể làm thăm
với các từ khóa sau đây:
ethanol,
methanol,
alcoholic,
hydroxyl,


fermentation, clean fuel,

beverage, combustion of
alcohol,
oxidation
of
alcohol.
E. WORKED EXAMPLES
Exercise 1. Ethanol vapour burns in air according to the following equation:
→

2C2H5OH (g) + 6O2 (g)
4CO2 (g) + 6H2O (g)
If 2.5 L of ethanol burns at s.t.p., what volume of oxygen is required? What volume of
carbon dioxide will be produced?
Solution:
→

2C2H5OH (g) + 6O2 (g)
4CO2(g) + 6H2O (g)
2.0 L
6.0 L
4.0 L
2.5 L → 7.5 L → 5.0 L
Exercise 2. Methanol is soluble in water. What is the molality of a solution made by
dissolving 8.0 g of CH3OH in 250 g of water?
Solution:
→

8
100 = 3.1 %
258

The mass of solution 8 + 250 = 258 (grams)
C % CH3OH solution =
F. HOMEWORK
1. An alcohol has the molecular formula C4H10O.
a) Draw the full structural formula of this alcohol.
b) Give one physical property and one chemical property of this alcohol.
2. The figure here shows the apparatus used for fermentation.

.

a) Name the substances present in the fermenting mixture.
b) Write the word equation for the reaction that takes place inside the apparatus.
c) Describe what will happen if the resulting mixture is exposed to air.
3. State two differences between the hydroxide group in sodium hydroxide and the
hydroxyl group in alcohols.

TÀI LIỆU THAM KHẢO
1. Cao Cự Giác (Chủ biên), Trần Trung Ninh (2018). Phương pháp dạy học hoá học bằng
tiếng Anh ở trường Trung học phổ thông. Nxb Đại học Vinh.
2. Cao Cự Giác (2019). Dạy học một số chủ đề hoá học bằng tiếng Anh. Nxb Giáo dục.