GIAO AN SONG NGỮ hóa học 10

CHLORINE I. Objectives 1. Knowledge Ss know physical properties, natural occurrence, applications and synthesis of chlorine. Ss understand : The basic chemical property of chlorine is that it has strong oxidative property. Besides it is still a reducing agent. 2. Skills Ss predict, test and conclude about basic chemical property of chlorine. Ss obsever experiments and conclude about chemical property of chlorine. 3. Attitude Ss have a good attitude about problem protecting the environment. II. Method Talking, using experiment movies. III. Preparing 1. Teacher: reference books, computer and projector. 2. Student: Read the lesson before starting. IV. Procedure 1. Class organization Class attending Student absent 11A2 2. Checking the previous lesson 3. New lesson Contents Teachers activitiesStudents’ activity I. PHYSICAL PROPERTIES In normal condition, chlorine is a greenish – yellow, pungent, very toxic gas. It can destroy the mucosa of respiratory tract. Chlorine gas is 2.5 times heavier than air and can dissolve in water. Chlorine gas can dissolve strongly in organic solvents, for example: benzene, ethanol, hexane, carbon tetrachloride,… Activity 1: : researching on the physical properties of chlorine T shows a bottle of chlorine gas and gives a question to S:That a bottle containing chlorine, please observe and give some physical properties of chlorine. T: Is chlorine lighter or heavier than the air?Calculate the relative density of chlorine with respect to the air. T notes S about toxicity, solubility in water and organic solvents of chlorine. II. CHEMICAL PROPERTIES The basic chemical property of chlorine is that it has strong oxidative property. 1. Reactions with metal 2Na + Cl2 → 2NaCl Cu + Cl2 → CuCl2 2Fe + 3Cl2→ 2FeCl3 Conclusion: Chlorine gas can directly oxidize most metals to form chloride salts correspondingto the highestoxidation number of chlorine . 2.Reactions with hydrogen + → 2 Conclusion: In reactions with metals and hydrogen, chlorine exhibits strongly oxidative property. 3.Reactions with water Cl2 + H2O + Activity 2:researching on the chemical properties of chlorine T: Basing on electronegativity and structure of chlorine atom, can you predict what basic chemical property of chlorine is? T: Show experiment video of chlorine and sodium, copper, iron. S: observe the phenomena occurring during experiments and write chemical equations. T: Asks S to determine the changing of oxidation number of chlorine atom, and deduce the role of chlorine in these reaction. T suggest S giving the conclusion. Activity 3: T introduces to S the condition of reaction between chlorine and hydrogen. S: write the chemical equation and determine the role of chlorine. Activity 4: T introduces the reaction of chlorine with water: When dissolved in water, part of chlorine gas reacts with water to form hydrochloric acid and hypochlorous acid. S determines the role of chlorine: Chlorine is both a reducing agent and an oxidizing agent. T adds: Since HClO is a strong oxidizing agent, chlorine water has a high bleaching property.

T: Nguyễn Thị Thu Hằng – Bình xuyên high school

Duyệt giáo án Ngày… tháng… năm 2018

- Ss know physical properties, natural occurrence, applications and synthesis of chlorine

- Ss understand : The basic chemical property of chlorine is that it has strong oxidative property Besides it is still a reducing agent

2 Skills

- Ss predict, test and conclude about basic chemical property of chlorine

- Ss obsever experiments and conclude about chemical property of chlorine

1 Teacher: reference books, computer and projector

2 Student: Read the lesson before starting

3 New lesson

I PHYSICAL PROPERTIES

- In normal condition, chlorine is a greenish

– yellow, pungent, very toxic gas It can

destroy the mucosa of respiratory tract

- Chlorine gas is 2.5 times heavier than air

and can dissolve in water

- Chlorine gas can dissolve strongly in

organic solvents, for example: benzene,

ethanol, hexane, carbon tetrachloride,…

Activity 1: : researching on the physical

properties of chlorine

T shows a bottle of chlorine gas and gives a

question to S:That a bottle containing chlorine, please observe and give some physical properties of chlorine.

T: Is chlorine lighter or heavier than the air?Calculate the relative density of chlorine with respect to the air

T notes S about toxicity, solubility in water and organic solvents of chlorine

II CHEMICAL PROPERTIES

The basic chemical property of chlorine is

that it has strong oxidative property.

1 Reactions with metal

2Na + Cl2 → 2NaCl

Cu + Cl2 → CuCl2

2Fe + 3Cl2→ 2FeCl3

Conclusion: Chlorine gas can directly

oxidize most metals to form chloride salts

correspondingto the highestoxidation

number of chlorine

2.Reactions with hydrogen

+ → 2

Conclusion: In reactions with metals and

hydrogen, chlorine exhibits strongly

T: Basing on electronegativity and structure

of chlorine atom, can you predict what basic chemical property of chlorine is?

T: Show experiment video of chlorine and sodium, copper, iron

S: observe the phenomena occurring during experiments and write chemical equations.T: Asks S to determine the changing of oxidation number of chlorine atom, and deduce the role of chlorine in these reaction

T suggest S giving the conclusion

S determines the role of chlorine: Chlorine isboth a reducing agent and an oxidizing agent

T adds: Since HClO is a strong oxidizing

agent, chlorine water has a high bleaching property.

III NATURAL OCCURRENCE

T: Asks students to read the page number of

99 on textbook and find the application of chlorine in our daily life

T introduces to S the method of producing chlorine in industry

4 Consolidation: Ssdo the exercises 1, 2 on page 101 of the textbook

5 Homework: Ss do the exercises from 3 to 7, on page 101 of the textbook

Prepare for the new lesson

Duyệt giáo án Ngày… tháng… năm 2018

2 Skills - Ss obsever experiments to identify chloride ion

3 Attitude Ss have a good attitude about problem protecting the environment

II Method

Talking, using experiment movies

III Preparing

1 Teacher: reference books, computer and projector

2 Student: Read the lesson before starting

II Chlohydric acid

T notes Ss about the condition of reaction.

Ss read the textbook and give the method to produce hydrochloric acid in industry

T guides students to analyze Figure 5.7 in the textbook and asks Ss to write the chemical equation for inllustrating

T provides more information about manufacture

of hydrochloric acid in industry: sulfate method and a large amount of HCl is obtained in industry from the chlorination process of organiccompounds (mainly hydrocarbon)

III CHLORIDE SALT AND

IDENTIFICATION OF CHLORIDE ION

1 Some chloride salts

* Solubility: Most chloride salts dissolve in

water, except some insoluble salts such as AgCl

and slightly soluble salts such as CuCl, PbCl2

*Application:

- NaCl: is the most important salt

+ Used as table salt, food preservation

+ Is an essential material in chemical industry to

synthesize NaOH, Cl2,H2,Javel water, HCl

acid,

- KCl: used as fertilizer

- ZnCl2: used to prevent from rooting

- AlCl3: used as a catalyst in organic synthesis

- BaCl2: used forpets control in agriculture

2 How to identify chloride ion

AgNO3 solution is the reagent to identify

chloride ion

NaCl + AgNO3 AgCl(white) + NaNO3

HCl + AgNO3 AgCl(white) + HNO3

of chloride ion

4 Consolidation: T give questions

- Give the examples to prove that HCl acid owns all chemical properties of acid and it has

reductive property

- Outlined how to identify chloride ion

5 Homework: Ss do the exercises from 1 to 7, on page 106 of the textbook

Duyệt giáo án Ngày… tháng… năm 2018

- Ss know: The method to produce chlohydric acid in the laboratory and in industry

Identification of chloride ion

- Ss understand : besides owning all general chemical properties of acid, hydrochloric acid exhibits reductive property because in HCl molecule, chlorine element has the lowest oxidation number of-1

2 Skills- Ss obsever experiments to identify chloride ion

3 Attitude Ss have a good attitude about problem protecting the environment

II Method Talking, using experiment movies.

III Preparing

1 Teacher: reference books, computer and projector

2 Student: Read the lesson before starting

IV Procedure

1 Class organization

2 Checking the previous lesson

NaClO ( sodium hypochloride).

1 Application

Javel water has bleaching and antiseptic

properties It is used to bleach cotton, fiber,

paper and to disinfect cages, toilets

2 Properties

NaClO is a salt of weak acid (weaker than

carbonic acid) Hence, it reacts gradually with

CO2 in the air to form unstable hypochlorous

acid HClO

NaClO + CO2 + H2O → NaHCO3 + HClO

Both NaClO and HClO in the solution have very

strong oxidative property

3 Synthesis

- In the laboratory, let chlorine gas react with

dilute NaOH solution at ambient temperatures

- In industry, Javel water is produced by

electrolysis of NaCl solution (concentration

from 15 to 20%) in the electrolysis barrel

without diaphragm

javel water so who can give me some applications of this solution?

Ss give some applications of javel water

T adds: NaClO salt is a very strong oxidizing agent so javel water has bleaching and antisepticproperties

II CHLORIDE OF LIME

1.Molecular structure and properties

- Molecular structure is CaOCl2

- chloride of lime is a mixed salt

- Chloride of lime is a white, porous powder

- Chemical properties:

+ Is the salt of weak acid

+ Has strong oxidative property just like Javel

water

2 Applications

- It is used to bleach cotton, fiber, paper

It is used to disinfect landfills, sewers, cages,…

- A large amount of chloride of lime is used in

5 Homework: - Do the exercises 2,3, and 5 on page 108 in the textbook

- read the lesson 25 to prepare for the following lesson

Duyệt giáo án Ngày… tháng… năm 2018

1 Teacher: reference books, computer and projector.

2 Student: Review the previous lesson by themselves before starting

IV Procedure

1 Class organization

10A3

2 Checking the previous lesson

Write the chemical equations to finish the following series ( write the condition of thereactions clearly)

NaCl

I.SUMMARING THE KNOWLEDGE

- Physical properties and natural occurrence

a Using chlorine gas and starch

6 Starch changes from white to blue

Activity 1:

T gives the questions to help Ss summary whole knowledge about fluorine, bromine and iodine

Activity 2:

T asks and guides Ss to do the exercises in the textbook

Hydrofluoric acid is a weak acid but exhibits

a special property of corroding glass devices.Chemical equation:

HBr + NaOH → NaBr + H2O

nHBr= 1/81 <nNaOH = 1/40deduce, the obtained solution turns litmus blue

Have strong oxidative property, and decreasegradually from fluorine to iodine

2F2 + 2H2O  4HF + O2

Iodine hardly reacts with water

Cl2 + 2KI → KCl + 2I2Iodine obtaining reacts with starch to form a blue compound

4 Consolidation: T summaries whole knowledge about halogen group

5 Homework: - Review the previous lessons by themselves and read the lesson 26 before starting

Duyệt giáo án Ngày… tháng… năm 2018

OH

Cl02  2 HCl1  HCl1O

OH

Br02  2 HBr1  HBr1O

Vũ thị Minh Thúy

Date of preparing: 15/03/2018 Teaching date: 24/03/2018

Period 46 – Lesson 26 REVIEW: HALOGEN GROUP (period 2)

I OBJECTIVES

1 Knowledge

- Ss understand : The basic chemical property of fluorine, bromine, iodine is the oxidizing property, fluorine has the strongest oxidizing properties; the reason for decreasing gradually the oxidative property from fluorine to iodine

2 Skills

- Ss do qualitative exercises and Quantitative exercises about fluorine, bromine and iodine

3 Attitude Ss have positive attitude and proactive when doing exercises about fluorine, bromine and iodine

II Method Talking, problem solving.

III Preparing

1 Teacher: reference books, computer and projector

2 Student: Review the previous lesson by themselves before starting

IV Procedure

1 Class organization

2 Checking the previous lesson

T continues to help SS review without checking the previous lesson

a) 1s22s22p63s23p63d104s24p5

b) Br: Bromine, Br – Br

c) Basic chemical property: Strong oxidative

property

d) Bromine has oxidative property which is

stronger than iodine and is weaker than

Chlorine has stronger oxidative property

than bromine and iodine

4 Consolidation: T summaries whole knowledge about halogen group

5 Homework: - Review the previous lessons by themselves and read the lesson 26 before starting

Duyệt giáo án Ngày… tháng… năm 2018

- Ss know the position, structure, physical properties and applications of oxygen

- Ss understand : the chemical properties of oxygen

2 Skills: Writing reaction equation

3 Attitude: Ss have positive attitude and proactiveto plant trees

II Method Talking, problem solving.

III Preparing

1 Teacher: reference books, computer and projector

2 Student: Review the previous lesson by themselves before starting

I POSITION AND STRUCTURE

Oxygen has the atomic number of 8, belongs

to group VIA, period 2 of the Periodic table

of chemical elements

- The electron configuration : 1s22s22p4

- The structural formula: O=O

II PHYSICAL PROPERTIES

- Oxygen gas is colorless, odourless,

tasteless gas which is quite heavier than air

Ss gives the position and structure of oxygen

Basing on previous knowledge and reading the textbook, Ss give the physical properties

of oxygen

- Under the atmospheric pressure, oxygen

liquefies at -183oC

- Oxygen gas dissolves weakly in water

III CHEMICAL PROPERTIES

Oxygen is a reactive non – mental, and it has

strong oxidative property

1.Reacting with metals

2 Reacting with non – metals

3 Reacting with compounds

- CO burns in the air

- Ethanol burns in the air

T suggests Ss giving the chemical properties

of oxygen and writing the reaction equation

to illustrate

IV APPLICATIONS

- Oxygen plays an important role in human

and animals’ life

- Annually, countries in all over the wall

produce tens of million tonnes of oxygen to

meet industrial demands

Ss give the applications of oxygen.

4 Consolidation: T summaries whole knowledge about oxygen

5 Homework: - Review the previous lessons by themselves and read the lesson 30 before starting

Duyệt giáo án Ngày… tháng… năm 2017

Vũ thị Minh Thúy

Date of preparing: 04/04/2018 Teaching date: 04/04/2018

Period 51 – Lesson 30

I OBJECTIVES

1 Knowledge

- Ss know the position, structure, physical properties and applications of SULFUR

- Ss understand : the chemical properties of SULFUR

2 Skills: Writing reaction equation

3 Attitude: Ss have positive attitude and proactive when doing exercises of sulfur

II Method

Talking, problem solving

III Preparing

1 Teacher: reference books, computer and projector

2 Student: Review the previous lesson by themselves before starting

IV Procedure

1 Class organization

10A3

2 Checking the previous lesson

Checking the homework

3 New lesson

I POSITION AND ATOMIC ELECTRON

CONFIGURATION

- Position: Sulfur atomic has the atomic number

of 16 It belongs to groupVIA, period 3 of the

Periodic Table of chemical elements

- Atomic electron configuration:

1s22s22p63s23p4

Ss give the position of sulfur

II PHYSICAL PROPERTIES

Sulfur has two allotropes: Rhombic sulfur (Sα)

and monoclinic sulfur (Sβ)

- Two allotropes are different in crystal structure

and some physical properties, but they have the

same chemical properties

T gives information

III CHEMICAL PROPERTIES T suggests Ss giving chemical properties of

When sulfur element participate in reactions, its

oxidation number can decrease or increase

Thus, we say that sulfur exhibits oxidative and

Hg S �Hg O  (at ambient temperature)

In these reactions, S exhibits oxidative property

2 sulfur reacts with non – metals

S reacts with some non – metals at suitable

IV APPLICATIONS OF SULFUR

Sulfur has a large number of important

applications in many industries

Ss read the textbook and give information

V NATURAL OCCURRENCE AND

SULFUR PRODUCTION

- In nature, sulfur occurs mostly in the element

form, forming large mines in the Earth’s crust

- sulfur also occurs in the form of compounds

such as sulfate salts and sulfide salts

* To exploit sulfur from a sulfur mine, special

equipment is used

T gives give information

4 Consolidation: T summaries whole knowledge about halogen group

5 Homework: - Review the previous lessons by themselves and read the lesson 26 before starting

Duyệt giáo án Ngày… tháng… năm 2018

Vũ thị Minh Thúy

Date of preparing: 04/04/2018 Teaching date: 11/04/2018

Period 53 – Lesson 32

HYDROGEN SULFIDE SULFUR DIOXIDE SULFUR TRIOXIDE (p1)

I OBJECTIVES

1 Knowledge- Ss know the physical properties and applications of HYDROGEN SULFIDE, SULFUR DIOXIDE

- Ss understand : the chemical properties of HYDROGEN SULFIDE, SULFUR DIOXIDE

2 Skills: Writing reaction equation

3 Attitude: Ss have positive attitude and proactive to protect environment

II MethodTalking, problem solving.

III Preparing

1 Teacher: reference books, computer and projector

2 Student: Review the previous lesson by themselves before starting

- Hydrogen sulfide is a colorless gas with the

smell of a rotten egg and is very poisonous

- H2S gas is a little heavier than the air and

dissolves slightly in water

Ss read the textbook and give the physical

properties

III CHEMICAL PROPERTIES

1 Weak acidic properties

Hydrogen sulfide dissolves in water to form

very weak acid solution called hydrosulfuric

acid

H2S + NaOH  NaHS + H2O

H2S + 2NaOH  Na2S + 2H2O

2 Strong reductive property

Hydrogen sulfide is said to have strong

reductive property

*

* Note: when H2S solution contacts oxygen in

Write chemical equation to illustrate

the air, it gradually becomes yellow cloudy.

V NATURAL OCCURRENCE AND

SYNTHESIS

- In nature, hydrogen sulfide occurs in stream

water and in volcanic gas and releases from dead

bodies of humans and animals…

- In industry, hydrogen sulfide gas is not

produced In the laboratory, it is synthesized in

the chemical reaction of hydrochloric acid with

iron (II) sulfide

FeS + 2HCl  FeCl2 + H2S

Ss read the textbook

B SULFIDE DIOXIDE

I PHYSICAL PROPERTIES

- Sulfur dioxide is a colorless, pungent, is

heavier than air

- It dissolves strongly in water

- Sulfur dioxide is a toxic gas

Ss read the textbook

4 Consolidation: T summaries whole knowledge about halogen group

5 Homework: - Review the previous lessons by themselves and read the new lesson before

starting

Duyệt giáo án Ngày… tháng… năm 2018

Vũ thị Minh Thúy

Date of preparing: 10/04/2018 Teaching date: 18/04/2018

Period 55 – Lesson 33 SULFURIC ACID SULFATE SALT

I OBJECTIVES

1.Knowledge

-Give some important physical properties of sulfuric acid such as state, color, density,solubility, etc

- Understand chemical properties of dilute and concentrated sulfuric acid, especially reactionwith basic oxides, bases, salts, metals and non-metals

- Know role of sulfuric acid in the national economy

- Remember method to produce sulfuric acid in industry

2.Skills

-Writechemicalequations to illustratethechemicalpropertiesof sulfuric acid

-Solvethe exercises whichconcernthepropertiesandproductionof sulfuric acid

- Observe phenomena of the experiment relative to chemical properties

1 Teacher: reference books, computer and projector

2 Student: Review the previous lesson by themselves before starting

IV Procedure

1 Class organization

10A3

2 Checking the previous lesson Checking the homework

3 New lesson Teaching processis designed into activities,showing pedagogical processof the

elected active teaching methods

Activity 1: Physical properties

- Teacher: Asks students to observe the bottle

of concentrated sulfuric acid and to remark

the physical properties of it

- Q: How can concentrated sulfuric acid be

diluted?

- Teacher: Gives some extra information:

H2SO4 dissolves in water infinitely and

releases a lot of heat If we pour water into

H2SO4, water boils suddenly and acid drops

spout out dangerously

- To dilute concentrated H2SO4 acid, acid must be

glass rod This cannot be done in opposite way

Figure 6.6 The diluting method of concentrated H 2 SO 4

Activity 2: Chemical properties

- Q1: What do you know about the chemical

properties of H2SO4?

- Ans 1: It is a strong acid.

- Q2: What are the common oxidation states

- Q4: According to that oxidation state, which

chemical property does concentrated sulfuric

acid have?

- Ans: Oxidative property.

- Teacher: Asks students to list some general

properties of dilute sulfuric acid

- Q: Answer some exercises for reactions of

dilute sulfuric acid and metals, basic oxides,

bases and salts

- Teacher: + Prepares and shows some

experiments of concentrated sulfuric acid

II Chemical properties

* Remark:

- Sulfuric acid is a strong acid (have learned in chapter

I Chemistry 9th grade)

- Concentrated sulfuric acid is a strong oxidant

1 Properties of dilute sulfuric acid

Dilute sulfuric acid has general properties of acid, theseare: