Inorganic Chemistry

Periodicity - Physical Properties of Halogens

By the end of the lesson, the learner should be able to:

- Describe physical properties of halogens
- Investigate appearance, smell, and physical states of halogens
- Observe safety when handling halogens

In groups, learners are guided to:

- Prepare chlorine gas and investigate its physical properties
- Observe physical properties of chlorine, bromine, and iodine
- Record appearance, smell, and physical states

What are the physical properties of halogens?

- Chemistry Learner's Book
- Laboratory equipment
- Chlorine, bromine, iodine samples
- Fume cupboard

- Practical assessment - Observation - Written exercises

Inorganic Chemistry

Periodicity - Trends in Physical Properties of Halogens
Periodicity - Reaction of Chlorine with Water

By the end of the lesson, the learner should be able to:

- Describe trends in physical properties down Group VII
- Explain the trend in melting and boiling points
- Relate trends to molecular size

- Describe the reaction of chlorine with water
- Explain the bleaching action of chlorine water
- Write equations for the reaction

In groups, learners are guided to:

- Discuss trends in physical properties of halogens
- Plot graphs showing melting and boiling point trends
- Research on solubility of halogens in water

- Carry out experiments on reaction of chlorine with water
- Investigate the bleaching action of chlorine water
- Write equations for the reaction

How do physical properties of halogens change down the group?
How does chlorine react with water?

- Chemistry Learner's Book
- Digital devices
- Data tables
- Graph paper

- Chemistry Learner's Book
- Laboratory equipment
- Chlorine water
- Litmus paper

- Written exercises - Oral questions - Group discussions
- Practical assessment - Written exercises - Observation

Inorganic Chemistry

Periodicity - Reaction of Chlorine with Metals

By the end of the lesson, the learner should be able to:

- Describe the reaction of chlorine with metals
- Write equations for reactions of chlorine with metals
- Appreciate the reactivity of halogens

In groups, learners are guided to:

- Carry out experiments on reaction of chlorine with metals
- Observe reaction of heated iron with chlorine
- Write balanced equations for the reactions

How does chlorine react with metals?

- Chemistry Learner's Book
- Laboratory equipment
- Iron filings, sodium
- Fume cupboard

- Practical assessment - Written exercises - Observation

Inorganic Chemistry

Periodicity - Reaction of Chlorine with Hydrogen

By the end of the lesson, the learner should be able to:

- Describe the reaction of chlorine with hydrogen
- Write equations for the reaction
- Show awareness of safety with explosive reactions

In groups, learners are guided to:

- Discuss the reaction of chlorine with hydrogen
- Watch videos demonstrating the reaction
- Write balanced equations for the reaction

How does chlorine react with hydrogen?

- Chemistry Learner's Book
- Digital devices
- Videos on reactions
- Internet access

- Oral questions - Written exercises - Observation

Inorganic Chemistry

Periodicity - Displacement Reactions of Halogens

By the end of the lesson, the learner should be able to:

- Explain displacement reactions of halogens
- Carry out experiments on halogen displacement
- Relate displacement to reactivity series

In groups, learners are guided to:

- Carry out displacement reactions of halogens
- Add chlorine water to potassium bromide and iodide solutions
- Record colour changes and write equations

Why can chlorine displace bromine and iodine from their salts?

- Chemistry Learner's Book
- Laboratory equipment
- Halogen solutions
- Potassium halide solutions

- Practical assessment - Written exercises - Observation

Inorganic Chemistry

Periodicity - Bleaching Action of Chlorine
Periodicity - Physical Properties Across Period 3

By the end of the lesson, the learner should be able to:

- Explain the bleaching action of chlorine
- Carry out experiments to demonstrate bleaching
- Compare bleaching by chlorine and sulphur dioxide

- Describe trends in physical properties across Period 3
- Explain trends in atomic size and ionisation energy
- Appreciate periodic trends

In groups, learners are guided to:

- Carry out experiments to investigate bleaching action of chlorine
- Test bleaching on moist and dry litmus paper
- Discuss the mechanism of bleaching

- Discuss trends in physical properties across Period 3
- Plot graphs showing atomic radius and ionisation energy trends
- Research on electronegativity trends

How does chlorine act as a bleaching agent?
How do physical properties change across Period 3?

- Chemistry Learner's Book
- Laboratory equipment
- Chlorine water
- Coloured fabric/litmus paper

- Chemistry Learner's Book
- Digital devices
- Data tables
- Graph paper

- Practical assessment - Written exercises - Observation
- Written exercises - Oral questions - Group discussions

Inorganic Chemistry

Periodicity - Melting and Boiling Points Across Period 3

By the end of the lesson, the learner should be able to:

- Describe trends in melting and boiling points across Period 3
- Explain variations in terms of structure and bonding
- Relate properties to bonding types

In groups, learners are guided to:

- Research on melting and boiling points of Period 3 elements
- Plot graphs showing trends
- Discuss reasons for the observed pattern

Why do melting and boiling points vary across Period 3?

- Chemistry Learner's Book
- Digital devices
- Data tables
- Graph paper

- Written exercises - Oral questions - Observation

Inorganic Chemistry

Periodicity - Reactions of Period 3 Elements with Oxygen

By the end of the lesson, the learner should be able to:

- Describe reactions of Period 3 elements with oxygen
- Write equations for the reactions
- Compare the oxides formed

In groups, learners are guided to:

- Carry out experiments on reactions of Period 3 elements with oxygen
- Burn magnesium, sulphur, and phosphorus in oxygen
- Write balanced equations for the reactions

How do Period 3 elements react with oxygen?

- Chemistry Learner's Book
- Laboratory equipment
- Period 3 element samples
- Safety equipment

- Practical assessment - Written exercises - Observation

Inorganic Chemistry
Physical Chemistry

Periodicity - Applications of Group I, II, VII, and VIII Elements
Acids and Bases - Definition and Examples of Acids

By the end of the lesson, the learner should be able to:

- Outline uses of selected elements in Groups I, II, VII, and VIII
- Relate properties to applications
- Appreciate the importance of elements in daily life

In groups, learners are guided to:

- Search for information on uses of selected elements
- Discuss applications of sodium, calcium, chlorine, and argon
- Present findings on element applications

How are elements of Groups I, II, VII, and VIII used in daily life?

- Chemistry Learner's Book
- Digital devices
- Charts showing element uses
- Internet access
- Samples of common acids
- Charts showing acids

- Oral questions - Written exercises - Group presentations

Physical Chemistry

Acids and Bases - Dissociation of Acids in Water
Acids and Bases - Physical Properties of Acids
Acids and Bases - Reaction of Acids with Metals
Acids and Bases - Reaction of Acids with Carbonates

By the end of the lesson, the learner should be able to:

- Explain the dissociation of acids in water
- Write dissociation equations for common acids
- Relate acidity to hydrogen ion concentration

- Describe the reaction of acids with metals
- Write equations for reactions of acids with metals
- Collect and test for hydrogen gas

In groups, learners are guided to:

- Carry out experiments to demonstrate dissociation of acids in water
- Discuss the role of hydrogen ions in acidity
- Write dissociation equations for HCl, H₂SO₄, and HNO₃

- Carry out experiments on reactions of acids with metals
- Collect and test for the gas produced
- Write balanced equations for the reactions

How do acids behave when dissolved in water?
How do acids react with metals?

- Chemistry Learner's Book
- Laboratory equipment
- Dilute acids
- Conductivity apparatus
- Digital devices
- Charts showing acid properties
- Safety equipment
- Chemistry Learner's Book
- Laboratory equipment
- Dilute acids
- Metal samples (Mg, Zn, Fe)
- Sodium carbonate, calcium carbonate

- Practical assessment - Written exercises - Oral questions
- Practical assessment - Written exercises - Observation

Physical Chemistry

Acids and Bases - Reaction of Acids with Hydrogen Carbonates
Acids and Bases - Reaction of Acids with Metal Oxides

By the end of the lesson, the learner should be able to:

- Describe the reaction of acids with hydrogen carbonates
- Write equations for reactions of acids with hydrogen carbonates
- Compare reactions of carbonates and hydrogen carbonates

In groups, learners are guided to:

- Carry out experiments on reactions of acids with hydrogen carbonates
- Collect and test for the gas produced
- Write balanced equations for the reactions

How do acids react with hydrogen carbonates?

- Chemistry Learner's Book
- Laboratory equipment
- Dilute acids
- Sodium hydrogen carbonate
- Metal oxides (CuO, MgO)

- Practical assessment - Written exercises - Observation

Physical Chemistry

Acids and Bases - Reaction of Acids with Hydroxides
Acids and Bases - Definition and Examples of Bases

By the end of the lesson, the learner should be able to:

- Describe the reaction of acids with hydroxides
- Write equations for neutralisation reactions
- Appreciate the importance of neutralisation

In groups, learners are guided to:

- Perform experiments to investigate reactions of acids and bases with metal hydroxides
- Carry out neutralisation reactions
- Write balanced equations for the reactions

How do acids react with metal hydroxides?

- Chemistry Learner's Book
- Laboratory equipment
- Dilute acids
- Sodium hydroxide solution
- Digital devices
- Samples of common bases
- Charts showing bases

- Practical assessment - Written exercises - Observation

Physical Chemistry

Acids and Bases - Dissociation of Bases in Water

By the end of the lesson, the learner should be able to:

- Explain the dissociation of bases in water
- Write dissociation equations for common bases
- Relate basicity to hydroxide ion concentration

In groups, learners are guided to:

- Carry out experiments to demonstrate dissociation of bases in water
- Discuss the role of hydroxide ions in basicity
- Write dissociation equations for NaOH, KOH, and NH₃

How do bases behave when dissolved in water?

- Chemistry Learner's Book
- Laboratory equipment
- Alkali solutions
- Conductivity apparatus

- Practical assessment - Written exercises - Oral questions

Physical Chemistry

Acids and Bases - Acid-Base Indicators
Acids and Bases - Universal Indicator and pH Scale

By the end of the lesson, the learner should be able to:

- Define indicators
- Identify common acid-base indicators
- Use indicators to test for acids and bases

- Explain the pH scale
- Use universal indicator to determine pH
- Relate pH values to acidity and basicity

In groups, learners are guided to:

- Conduct experiments to determine strength of acids and bases using indicators
- Test solutions with litmus, phenolphthalein, and methyl orange
- Record colour changes in different solutions

- Discuss the pH scale and its range
- Use universal indicator to test various solutions
- Match pH values with colours on the pH chart

What are indicators and how do they work?
What is the pH scale and how is it used?

- Chemistry Learner's Book
- Laboratory equipment
- Various indicators
- Acid and base solutions

- Chemistry Learner's Book
- Universal indicator
- pH chart
- Various solutions

- Practical assessment - Written exercises - Observation

Physical Chemistry

Acids and Bases - Strong and Weak Acids

By the end of the lesson, the learner should be able to:

- Distinguish between strong and weak acids
- Compare pH values of strong and weak acids
- Relate strength to degree of dissociation

In groups, learners are guided to:

- Compare pH values of hydrochloric acid and ethanoic acid of same concentration
- Carry out activities to compare electrical conductivity
- Discuss the degree of dissociation in strong and weak acids

What is the difference between strong and weak acids?

- Chemistry Learner's Book
- Laboratory equipment
- HCl and CH₃COOH solutions
- Conductivity apparatus

- Practical assessment - Written exercises - Oral questions

Physical Chemistry

Acids and Bases - Strong and Weak Bases

By the end of the lesson, the learner should be able to:

- Distinguish between strong and weak bases
- Compare pH values of strong and weak bases
- Relate strength to degree of dissociation

In groups, learners are guided to:

- Compare pH values of sodium hydroxide and ammonia solution of same concentration
- Carry out activities to compare electrical conductivity
- Discuss the degree of dissociation in strong and weak bases

What is the difference between strong and weak bases?

- Chemistry Learner's Book
- Laboratory equipment
- NaOH and NH₃ solutions
- Conductivity apparatus

- Practical assessment - Written exercises - Oral questions

Physical Chemistry

Acids and Bases - Uses of Acids and Bases in Daily Life
Introduction to Salts - Meaning and Examples of Salts

By the end of the lesson, the learner should be able to:

- Outline uses of acids and bases in daily life
- Relate properties of acids and bases to their applications
- Appreciate the importance of acids and bases

In groups, learners are guided to:

- Search for information on applications of acids and bases
- Discuss uses in food, medicine, cleaning, and industry
- Properly dispose of waste after experiments

How are acids and bases used in daily life?

- Chemistry Learner's Book
- Digital devices
- Charts showing applications
- Internet access
- Samples of salts (table salt, fertilisers)
- Charts showing salts

- Oral questions - Written exercises - Group presentations

Physical Chemistry

Introduction to Salts - Normal Salts
Introduction to Salts - Acidic Salts
Introduction to Salts - Basic and Double Salts
Introduction to Salts - Solubility of Chlorides and Nitrates

By the end of the lesson, the learner should be able to:

- Define normal salts
- Give examples of normal salts
- Write formulae of normal salts

- Define basic salts and double salts
- Give examples of basic and double salts
- Categorise salts into different types

In groups, learners are guided to:

- Discuss with peers the meaning of normal salts
- Identify examples of normal salts
- Write formulae and names of common normal salts

- Discuss with peers basic and double salts
- Identify examples of basic and double salts
- Categorise given salts into appropriate types

What are normal salts and how are they formed?
What are basic salts and double salts?

- Chemistry Learner's Book
- Digital devices
- Samples of normal salts
- Periodic table
- Charts showing salt types
- Internet access
- Chemistry Learner's Book
- Digital devices
- Charts showing salt types
- Internet access
- Laboratory equipment
- Various chlorides and nitrates
- Distilled water

- Oral questions - Written exercises - Observation

Physical Chemistry

Introduction to Salts - Solubility of Sulphates and Carbonates
Introduction to Salts - Direct Synthesis

By the end of the lesson, the learner should be able to:

- Determine solubility of sulphates and carbonates in water
- Classify sulphates and carbonates as soluble or insoluble
- Apply solubility rules to predict salt solubility

In groups, learners are guided to:

- Carry out experiments to determine solubility of sulphates in water
- Test solubility of various carbonates
- Create a solubility table for common salts

Which sulphates and carbonates are soluble in water?

- Chemistry Learner's Book
- Laboratory equipment
- Various sulphates and carbonates
- Distilled water
- Iron filings
- Chlorine gas

- Practical assessment - Written exercises - Observation

Physical Chemistry

Introduction to Salts - Reaction of Acids with Metals
Introduction to Salts - Reaction of Acids with Bases (Neutralisation)

By the end of the lesson, the learner should be able to:

- Prepare salts by reacting acids with metals
- Write equations for the reactions
- Observe safety when handling acids

In groups, learners are guided to:

- Carry out experiments to prepare salts by reacting acids with metals
- React zinc with dilute sulphuric acid
- Write balanced equations for the reactions

How are salts prepared from acids and metals?

- Chemistry Learner's Book
- Laboratory equipment
- Dilute acids
- Metal samples (Zn, Mg)
- Alkali solutions

- Practical assessment - Written exercises - Observation

Physical Chemistry

Introduction to Salts - Reaction of Acids with Carbonates and Hydrogen Carbonates

By the end of the lesson, the learner should be able to:

- Prepare salts by reacting acids with carbonates
- Write equations for the reactions
- Collect and identify products formed

In groups, learners are guided to:

- Carry out experiments to prepare salts from carbonates
- React dilute acid with sodium carbonate
- Write balanced equations for the reactions

How are salts prepared from carbonates and hydrogen carbonates?

- Chemistry Learner's Book
- Laboratory equipment
- Dilute acids
- Carbonates and hydrogen carbonates

- Practical assessment - Written exercises - Observation

Physical Chemistry

Introduction to Salts - Precipitation Reactions
Introduction to Salts - Hygroscopic Salts

By the end of the lesson, the learner should be able to:

- Prepare insoluble salts by precipitation
- Write ionic equations for precipitation reactions
- Apply solubility rules in precipitation

- Define hygroscopic salts
- Identify examples of hygroscopic salts
- Explain the behaviour of hygroscopic salts in air

In groups, learners are guided to:

- Carry out experiments to prepare insoluble salts by precipitation
- Mix solutions to form precipitates
- Write balanced ionic equations for precipitation reactions

- Carry out experiments to investigate behaviour of salts in air
- Expose different salts to atmosphere and observe changes
- Record observations on hygroscopic behaviour

How are insoluble salts prepared by precipitation?
What are hygroscopic salts and how do they behave in air?

- Chemistry Learner's Book
- Laboratory equipment
- Soluble salt solutions
- Filter paper and funnel

- Chemistry Learner's Book
- Laboratory equipment
- Samples of hygroscopic salts
- Watch glasses

- Practical assessment - Written exercises - Observation

Physical Chemistry

Introduction to Salts - Deliquescent Salts

By the end of the lesson, the learner should be able to:

- Define deliquescent salts
- Identify examples of deliquescent salts
- Distinguish between hygroscopic and deliquescent salts

In groups, learners are guided to:

- Carry out experiments to investigate deliquescent behaviour
- Expose calcium chloride and sodium hydroxide to air
- Compare hygroscopic and deliquescent salts

What are deliquescent salts and how do they differ from hygroscopic salts?

- Chemistry Learner's Book
- Laboratory equipment
- Samples of deliquescent salts
- Watch glasses

- Practical assessment - Written exercises - Observation

Physical Chemistry

Introduction to Salts - Efflorescent Salts

By the end of the lesson, the learner should be able to:

- Define efflorescent salts
- Identify examples of efflorescent salts
- Explain the loss of water of crystallisation

In groups, learners are guided to:

- Carry out experiments to investigate efflorescent behaviour
- Expose washing soda to air and observe changes
- Discuss the concept of water of crystallisation

What are efflorescent salts and why do they lose water?

- Chemistry Learner's Book
- Laboratory equipment
- Washing soda crystals
- Watch glasses

- Practical assessment - Written exercises - Observation

Physical Chemistry

Introduction to Salts - Applications of Salts in Daily Life

By the end of the lesson, the learner should be able to:

- Outline uses of salts in various industries
- Discuss effects of excessive use of inorganic fertilisers
- Appreciate the importance of salts in daily life

In groups, learners are guided to:

- Discuss with peers applications of salts in agriculture, food, medicine, and industry
- Search for information on effects of inorganic fertilisers on environment
- Discuss mitigation measures for environmental challenges

How are salts used in daily life and what are the environmental concerns?

- Chemistry Learner's Book
- Digital devices
- Charts showing salt applications
- Internet access

- Oral questions - Written exercises - Group presentations