**2022/2023 First Term Chemistry Scheme Of Work For SS2**

**UNIFIED SCHEME OF WORK FOR CHEMISTRY**

**CLASS: SENIOR SECONDARY SCHOOL TWO**

**TERM: FIRST TERM SCHEME OF WORK**

**WEEK ONE**

Cleaning of the School Compound

**WEEK TWO**

**TOPIC**

Mass volume Relationship

**CONTENT**

1-Mole ratio and mass relationship

2-Calculation of concentration, molar mass, moles, volume e.t.c

3-Stoichiometry of reactions

**BEHAVIOURAL OBJECTIVE**

*At the end of the lesson, Students should be able to:*

- Explain the concepts of the mole, molar, S.T.P; relative molar mass, and relative densities
- Solve problems involving reacting masses and volumes in chemical reactions.
- State the SI units of various fundamental quantities

**INSTRUCTIONAL MATERIALS**

Workbooks and textbooks

Sodium hydroxide (NaOH), hydrochloric acid HCL, Copper oxide e.t.c.

Magnesium

Ribbon

**TEACHER’S ACTIVITIES**

- Enumerate the mole concepts, molar, S.T.P relative densities e.t.c.
- Teachers guide the students to calculate: The masses of reactions and products.
- Guides Students to calculate:
- several moles of reacting substances and products.

**LEARNER’S ACTIVITIES**

- Calculate the masses, moles, and volumes in chemical reactions
- Participates in class review exercises.
- Compute or write the number of moles and molar mass of reactants and products from chemical equations of a chemical reactions

**WEEK THREE**

**TOPIC**

Types of Reaction

**CONTENT**

Decomposition, displacement, catalytic reaction, double-decomposition, thermal-dissociation, Reversible reaction

**BEHAVIOURAL OBJECTIVE**

*At the end of the lesson, Students should be able to:*

- Define the various types of reactions: such as catalytic reaction, decomposition, displacement reaction, e.t.c.

**INSTRUCTIONAL MATERIALS**

- Common reagents such as Sodium Chloride (NaCl), hydrochloric acid (HCl) e.t.c.
- Test tubes, beakers, sources of heat e.t.c.

**TEACHER’S ACTIVITIES**

- Guides the Students to identify reactants and products of any reaction.

**LEARNER’S ACTIVITIES**

- Ask questions and watch the teacher’s demonstration in the class.

**WEEK FOUR**

**TOPIC**

Redox Reaction

**CONTENT**

1. Oxidation and reduction

2. Oxidation number

3. Oxidizing and Reducing agents

4. Balancing of Redox Equation

**BEHAVIOURAL OBJECTIVE**

*At the end of the lesson, Students should be able to:*

- Define oxidation and reduction: as the addition of oxygen and removal of hydrogen
- Calculate the oxidation number of elements using a set of arbitrary rules like (a)Oxidation number of free elements=0, (b) Oxygen in any compound=-2 except in hydrogen peroxides=-1
- Define oxidizing and reducing agents in terms of the addition and removal of oxygen and hydrogen respectively.
- Balance the Redox reactions effectively through the steps.

**INSTRUCTIONAL**

**MATERIALS**

- Students textbooks
- Flip Chart
- Students textbooks
- Chalkboard
- Starch iodine paper
- Using of Students textbooks

**TEACHER’S ACTIVITIES**

- Guides Students to define Oxidation and Reduction
- Calculate Oxidation numbers of the central atom in H2SO4, HNO3e.t.c.
- It guides the students in distinguishing oxidizing agents from reducing agents.
- Guides the students to write a balanced Redox reaction or equation

**LEARNER’S ACTIVITIES**

- Students note the various definitions of oxidation and reduction reaction.
- Ask questions and calculate the oxidation of an atom in a compound
- Differentiate between oxidizing agents and reducing agents.
- Learn how to balance the Redox equation.

**WEEK FIVE**

**TOPIC**

Electrolysis

**CONTENT**

1. Definition of Electrolysis

2. Ionic Theory

3. Electrolyte and non-electrolyte

4. Preferential discharge of ions

5. Electrolysis of common electrolytes, e.g. acidified water, copper (II) sulfates, and brines.

**BEHAVIOURAL OBJECTIVE**

*At the end of the lesson, Students should be able to:*

- Define electrolysis, electrolytes (Strong, Weak, non-electrolytes)
- Explain Ionic theory: discharge of ions in the solution.
- Define electrolyte and non-electrolyte.
- Differentiate between electrolyte and non-electrolyte, strong and weak electrolytes.
- Identify the factors affecting the discharge of ions during electrolysis.
- Illustrates the electrolysis of brines, and acidified water.

**INSTRUCTIONAL MATERIALS**

- An electrolytic cell apparatus
- An electrochemical cell apparatus poster.
- Sodium hydroxide (NaOH)
- Ammonia (NH
_{3}), - An electrolytic cell apparatus.
- Using dilute H
_{2}SO_{4 }Brine

**TEACHER’S ACTIVITIES**

- Define Electrolysis to the Students
- Draw electrolytic and electrochemical cells.
- The teacher guides the students to know the differences between Strong and weak electrolytes and no-electrolyte.
- Guides Students to calculate the number of substances liberated or deposited at electrodes during electrolysis.
- Demonstrate the uses of electrolysis.
- Draw the electrolysis of some common electrolytes in the form of a chart to show to the Students

**LEARNER’S ACTIVITIES**

- Ask questions in the class on the topic discussed.
- Ask questions about the discussions in the class
- Differentiate between the electrolyte and non-electrolyte
- Calculate the amounts of substances discharged during electrolysis
- State the uses of electrolysis and its applications.

**WEEK SIX**

**TOPIC**

Electrolysis

**CONTENT**

(1) Laws of Electrolysis

Faraday’s laws of electrolysis

(2) Calculations

(3) Uses of Electrolysis

**BEHAVIOURAL OBJECTIVE**

*At the end of the lesson, Students should be able to:*

- State faraday’s laws of electrolysis
- Calculate the amount of substance librated or deposited at the electrode during electrolysis
- State the uses of electrolysis

**INSTRUCTIONAL MATERIALS**

- Textbooks
- Showing the electrolytic and electrochemical cells diagrams

**TEACHER’S ACTIVITIES**

- Explain Faraday’s first and second laws of electrolysis.
- Guides students to calculate the amount of substance librated or deposited at an electrode during electrolysis
- State the uses and application of electrolysis

**LEARNER’S ACTIVITIES**

- State Faraday’s first and second laws of electrolysis
- Solve some problems involving faraday’s law of electrolysis
- State the uses of electrolysis

**WEEK SEVEN**

**TOPIC**

Electrolysis

**CONTENT**

(1) Electrode Potential (Electrochemical cells)

(2) Electrochemical cell and electromotive force (E.M.F.) of cells.

**BEHAVIOURAL OBJECTIVE**

*At the end of the lesson, Students should be able to:*

- Explain electrode potential and the standard hydrogen electrode draw and write cell diagrams.
- Define the electromotive force of cells.

**INSTRUCTIONAL MATERIALS**

- Electrochemical cell diagram on a chart.
- Cells diagram

**TEACHER’S ACTIVITIES**

- Draw and write cell diagrams.
- Guides the students to draw and write cell diagram

**LEARNER’S ACTIVITIES**

- Explain electrode potential.
- Draw the cell diagram and able questions

**WEEK EIGHT**

**TOPIC**

Energy and chemical reactions

**CONTENT**

1- Rate of Reactions

2-Collision theory

3-Factors affecting the rate of reaction

**BEHAVIOURAL OBJECTIVE**

*At the end of the lesson, Students should be able to:*

- Define rate of reaction.
- Explain Collision theory
- List the factors affecting the rate of reactions

**INSTRUCTIONAL MATERIALS**

- Gas syringe, stopwatch, test tube, conical flask for laboratory experiment
- Charts showing the collision of molecules.
- Magnesium Ribbon and Dilute Hydrochloric acid in a chart.

**TEACHER’S ACTIVITIES**

- Guides the students to know the meaning of the rate of reaction
- Guides the students when showing the chart to them.
- Explain each factor properly to the Students

**LEARNER’S ACTIVITIES**

- Define the rate of reaction.
- Demonstrate the experiment.
- Explain the Collision theory through the charts.
- List factors affecting the rate of reaction

**WEEK NINE**

**TOPIC**

Acid-Base Reactions

**CONTENT**

Qualitative comparisons of conductance of molar solution of story-weak acid and base

**BEHAVIOURAL OBJECTIVE**

*At the end of the lesson, Students should be able to:*

- Define concentration in mold-3 of solutions
- Define Standard solutions
- explain the relationship between concentrations and volumes of reacting substances.

**INSTRUCTIONAL MATERIALS**

- Distilled water or deionized water
- Titration apparatus (retort stand, beaker, burette, pipette, conical flask, white tile e.t.c.
- Indicators

**TEACHER’S ACTIVITIES**

- Guides Students to Prepare standard solutions, and identify appropriate indicators for acid-base titration.
- Displays and explain the apparatus necessary for carrying out simple titrations

**LEARNER’S ACTIVITIES**

- To prepare standard solutions:
- carry acid
- base titrations using given indicators
- Record correct by titer values to two decimal places.

**WEEK TEN**

**TOPIC**

Simple Acid-Base Titration

**CONTENT**

- Preparation of standard solution for titration (Practical)
- Neutralization
- Indicators

**BEHAVIOURAL OBJECTIVE**

*At the end of the lesson, Students should be able to:*

- Prepare standard solution.
- Define neutralization process
- Define indicators and list different types of indicators used for the titration.

**INSTRUCTIONAL MATERIALS**

- Weighing balance, measuring cylinder, beaker, funnel e.t.c.
- Acids, Bases
- Methyl Orange
- Methyl red e.t.c.

**TEACHER’S ACTIVITIES**

- Demonstrate the process of acid-base titration
- Guides students to carry out the acid-base titration according to the instructions
- Teachers should ensure that students record properly and perform relevant calculations

**LEARNER’S ACTIVITIES**

- To carry out relevant calculations from the values.
- Construct a wooden retort stand.
- Ask questions during the practical class.

#### WEEK **ELEVEN**

**TOPIC**

Titration

**CONTENT**

Application i.e. Determination of:

- Percentage Purity
- Molar mass
- Water of crystallization

**BEHAVIOURAL OBJECTIVE**

*At the end of the lesson, Students should be able to:*

- Explain percentage purity
- Calculate the molar mass of the substances given.
- Analyze different salts for anions and cations

**INSTRUCTIONAL MATERIALS**

- Acids
- Bases

**TEACHER’S ACTIVITIES**

- Carry out titrations to determine:
- Percentage purity
- Explain to students how to calculate the molar mass of substances
- Explain to students how to calculate the molar mass of substances.
- Carry out a titration to determine water of crystallization

**LEARNER’S ACTIVITIES**

- Determine the purity of the substance
- Calculate the molar mass of a substance in a given solution.
- Determine the water of crystallization in a titration reaction.

**WEEK TWELVE & THIRTEEN**

Revision and Examination