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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 Vũ thị Minh Thúy Date of preparing: 10/01/2018 Teaching date: 27/01/2018 Period 38 – Lesson 22 CHLORINE I Objectives 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 Skills - Ss predict, test and conclude about basic chemical property of chlorine - Ss obsever experiments and conclude about chemical property of chlorine Attitude Ss have a good attitude about problem protecting the environment II Method Talking, using experiment movies III Preparing Teacher: reference books, computer and projector Student: Read the lesson before starting IV Procedure Class organization Class attending Student absent 11A2 Checking the previous lesson T: Nguyễn Thị Thu Hằng – Bình Xuyên high school New lesson Contents 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,… Teacher's activities/Students’ activity 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 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 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 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 T: Nguyễn Thị Thu Hằng – Bình Xuyên high school agent, chlorine water has a high bleaching property III NATURAL OCCURRENCE , Compounds: NaCl; KCl.MgCl2.6H2O IV APPLICATION V SYNTHESIS Synthesizing chlorine in the laboratory to 4 2 Mn O2 4H Cl Mn Cl Cl 2H 2O 7 1 2 6 1 2 Activity 5: T: Why does chlorine element only occur in nature in the form of compounds, and what are those compounds? Activity 6: T: Asks students to read the page number of 99 on textbook and find the application of chlorine in our daily life Activity 7: S: Read the textbook to give the method of preparing chlorine in the laboratory and write chemical equations 2K Mn O 16H Cl 2KCl Mn Cl 5Cl 8H 2O K Cr2 O7 14H Cl 2KCl Cr Cl 3Cl 7H 2O KClO3 + 6HCl →KCl+3Cl2+ 3H2O Manufacture of chlorine T introduces to S the method of producing 2NaCl+2H2O2NaOH+Cl2 +H2 chlorine in industry Consolidation: Ssdo the exercises 1, on page 101 of the textbook Homework: Ss the exercises from to 7, on page 101 of the textbook Prepare for the new lesson T: Nguyễn Thị Thu Hằng – Bình Xuyên high school Duyệt giáo án Ngày… tháng… năm 2018 Vũ thị Minh Thúy Date of preparing: 25/01/2018 Teaching date: 03/02/2018 Period 40 – Lesson 23 HYDROGEN CHLORIDE – HYDROCHLORIC ACID AND CHLORIDE SALT (P2) I OBJECTIVES Knowledge - 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 Skills - Ss obsever experiments to identify chloride ion Attitude Ss have a good attitude about problem protecting the environment II Method Talking, using experiment movies III Preparing Teacher: reference books, computer and projector Student: Read the lesson before starting IV Procedure Class organization Class 10A3 Checking the previous lesson attending Student absent New lesson Contents II Chlohydric acid Synthesis a) In the laboratory reaction of NaCl(s) + H2SO4 concentrated ( sulfate method) Teacher's activities/Students’ activities Activity 1: Ss read the textbook and give the method to synthesize cllohydric acid in the lab And write the chemical equations T: Nguyễn Thị Thu Hằng – Bình Xuyên high school t o 250 o C NaCl (s) + H2SO4cc NaHSO4 + HCl T notes Ss about the condition of reaction t o 400 o C 2NaCl (s) + H2SO4cc Na2SO4 + 2HCl Hydrogen chloride dissolved in water to form hydrochloric acid b) Manufacture of hydrochloric acid in industry (Integrated method) H2 + Cl2HCl (Sulfate method) (Chlorination process of organic compounds CH4 + Cl2 CH3Cl + HCl III CHLORIDE SALT AND IDENTIFICATION OF CHLORIDE ION 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 How to identify chloride ion AgNO3 solution is the reagent to identify chloride ion NaCl + AgNO3 AgCl(white) + NaNO3 HCl + AgNO3 AgCl(white) + HNO3 Consolidation: T give questions 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 organic compounds (mainly hydrocarbon) Activity 2: T: introduces to Ss about the ability to dissolve and the application of some chloride salts T carry out the experiment to identify chloride ion in hydrochloric acid and sodium chloride solution And conclude about the identification of chloride ion - 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 Homework: Ss the exercises from to 7, on page 106 of the textbook T: Nguyễn Thị Thu Hằng – Bình Xuyên high school Duyệt giáo án Ngày… tháng… năm 2018 Vũ thị Minh Thúy Date of preparing: 30/01/2018 Teaching date: 10/02/2018 Period 42 – Lesson 24 AN OVERVIEW OF CHLRORINE COMPOUNDS CONTAINING OXYGEN I OBJECTIVES Knowledge - 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 of1 Skills- Ss obsever experiments to identify chloride ion Attitude Ss have a good attitude about problem protecting the environment II Method Talking, using experiment movies III Preparing Teacher: reference books, computer and projector Student: Read the lesson before starting IV Procedure Class organization Class attending Student absent Checking the previous lesson New lesson Contents I JAVEL WATER Javel water is a solution of mixture of NaCl and Teacher's activities/Students’ activities Activity 1: T: I think many people among us have used T: Nguyễn Thị Thu Hằng – Bình Xuyên high school NaClO ( sodium hypochloride) Application Javel water has bleaching and antiseptic properties It is used to bleach cotton, fiber, paper and to disinfect cages, toilets 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 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 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 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 oil refining - Used to treat toxic substances and protect the environment Synthesis Cl2 + Ca(OH)2→ CaOCl2 + H2O 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 antiseptic properties Activity 2: T: guides Ss to comment about the properties of Javel water Activity 3: Ss: read the textbook and give the method to synthesis Javel water and write the chemical equations to illustrate Activity 4: T introduces to Ss about molecular structure and properties of chloride of lime Activity 5: Ss read the textbook and give the method to synthesize CaOCl2 Consolidation: T summaries whole knowledge and asks Ss to the exercises1, on page 108 in the textbook Homework: - Do the exercises 2,3, and on page 108 in the textbook - read the lesson 25 to prepare for the following lesson Duyệt giáo án Ngày… tháng… năm 2018 T: Nguyễn Thị Thu Hằng – Bình Xuyên high school Vũ thị Minh Thúy Date of preparing: 08/03/2018 Teaching date: 17/03/2018 Period 44 – Lesson 25 FLUORINE – BROMINE – IODINE (PERIOD 2) I OBJECTIVES 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 Skills - Ss qualitative exercises and Quantitative exercises about fluorine, bromine and iodine Attitude Ss have positive attitude and proactive when doing exercises about fluorine, bromine and iodine II Method Talking, problem solving III Preparing Teacher: reference books, computer and projector Student: Review the previous lesson by themselves before starting IV Procedure Class organization Class attending 10A3 Checking the previous lesson Student absent Write the chemical equations to finish the following series ( write the condition of the reactions clearly) NaCl T: Nguyễn Thị Thu Hằng – Bình Xuyên high school (1) (2) (3) (4) MnO2 �� � Cl2 �� � CaOCl2 �� � CaCl2 �� � CaCO3 (6) Br2 ��� AgBr New lesson Contents Teacher's activities/Students’ activities I.SUMMARING THE KNOWLEDGE - Physical properties and natural occurrence - Chemical properties II EXERCISES Exercises on page 113 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 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