SENIOR TWO

TERM I

 

TOPIC 10: REACTIONS OF METALS WITH OXYGEN- REACTIVITY SERIES FOR METALS 

DURATION:         6 Periods

GENERAL OBJECTIVE:   By the end of this topic the learner should be able to arrange metals in order of their reactivity with oxygen and apply the principles to different situations.                                                     

SPECIFIC OBJECTIVE

CONTENT

 

Learners should be able to:

·        Define the term affinity.

·        Describe the reaction between a given metal and metal oxide.

·        Explain the reaction between a given metal and metal oxide.

·        State the order of elements in the reactivity series.

 

 

·        Definition of affinity for oxygen.

·        Displacement reactions.

·        Competition reactions of the metals for oxygen 

·        Experiments to demonstrate the reactions of metals with metal oxides e.g. CO2/Mg, PbO/Mg

·        The reactivity series ( K, Na, Ca, Mg, Al, C, Zn)

 

 


 

TOPIC 11:         WATER                                 DURATION:       6 Periods

GENERAL OBJECTIVE:    By the end of this topic the learner should be able to state the properties of water.

SPECIFIC OBJECTIVE

CONTENT

Learners should be able to:

·        State the composition of water.

·        Test for the products of burning organic matter.

·        Explain the experiment showing that water contains hydrogen.

·        State the products of reaction of water and steam with different metals.

·        List the reactivity series obtained from metal/water reaction.

 

·        Composition of water.

·        The water cycle.

·        Burning of organic matter (energy source).

·        Water as an oxide of hydrogen.(Burning hydrogen and a candle in air)

·        Reactions of metals with water/steam.( Na, Ca, Mg with water and Mg, Zn, Fe with steam)

 

 


 

TOPIC 12:                                      HYDROGEN              DURATION:            6 Periods

GENERAL OBJECTIVE: By the end of this topic the learner should be able to prepare hydrogen in the laboratory and state its physical and chemical properties.

SPECIFIC OBJECTIVE

CONTENT

Learners should be able to:

·        Prepare and test for hydrogen in the laboratory.

·        State the physical and chemical properties of hydrogen.

·        Outline the uses of hydrogen.

·        Explain oxidation as gain of oxygen and reduction as loss of oxygen with reference to metal oxide-hydrogen reactions.

 

·        Laboratory preparation of hydrogen.

·        Test for hydrogen

·        Reactions of hydrogen gas.

·        Uses of hydrogen gas: -

-         manufacture of margarine

-         weather balloons.

-         manufacture of ammonia.

·        Oxidation and reduction in terms of gaining oxygen and losing hydrogen.(use copper (II) oxide, hydrogen reduction)

 

 


 

TOPIC 13:         ATOMIC STRUCTURES   DURATION: 9 Periods

GENERAL OBJECTIVE:    By the end of this topic the learner should be able to describe the structure of an atom and write the electronic configuration of the first twenty elements in the Periodic Table.

SPECIFIC OBJECTIVE

CONTENT

Learners should be able to:

·        Define an atom.

·        Name the particles of the atom.

·        Draw the simple atomic structure.

·        State the charges on each of the particles of the atom.

·        Define atomic number, relative atomic mass and isotope.

·        Write electronic configuration of various elements (1st 20 elements in the Periodic Table).

 

 

·        Definition of atom

·        Particles of an atom

·         Draw the structure of an atom.

·        Definition of atomic number and mass number.

·        Definition of isotopes, relative atomic mass, and examples and their significance.

·        Electronic configuration of the 1st 20 elements in periodic table.

·        Positive and negative charges (should be introduced through simple electrostatics, experiments with charges, rods and spheres.)

 


 

TOPIC 14: THE PERIODIC TABLE DURATION:           3 Periods

GENERAL OBJECTIVE:    By the end of this topic the learner should be able to locate the position of the different elements in the Periodic Table using electronic configuration.

SPECIFIC OBJECTIVE

CONTENT

Learners should be able to:

·        Define the Periodic Table.

·        Describe the history of the periodic time.

·        Arrange the first 20 elements in the Periodic Table.

·        Identify metals, non-metals and noble gases in relation to outermost electrons.

·        Describe the Period and group.

 

 

·        Definition of the Periodic Table and its history.

·        Groups in the Periodic Table (i.e. I, II, VII, O) and periods.

·        Arrangement of the 1st 20 elements in the Periodic Table.


TERM II

TOPIC 15: IONS AND IONIC COMPOUNDS DURATION:          6 Periods

 

GENERAL OBJECTIVE:         By the end of this topic the learner should be able to predict the type of ion formed from the electronic arrangement of the element.

 

SPECIFIC OBJECTIVE

CONTENT

Learners should be able to:

·        Define an ion.

·        Describe an octet and duplet.

·        Outline common ions.

·        Determine valencies of different elements.

·        Write simple chemical formulae.

·        Define multivalency.

·        Define a radical.

·        Identify elements that are multivalent.

·        Describe how simple ionic compounds are formed (e.g. sodium chloride).

 

 

 

·        Definition of an ion.

·        The characteristics feature of the outermost energy level (i.e. octet and duplet).

·        Formation of ions and determination of valencies.

·        The reaction between sodium and chlorine.

·        The reaction between magnesium and oxygen.

·        Common ions (e.g. Li+, Na+, Mg2+, Ca2+, Al3+, etc. F-, Cl-, NO3-, CO32-, etc.

·        Formulae of ionic compounds.

 


 

TOPIC 16: CHEMICAL FAMILIES: PATTERNS IN PROPERTIES                     DURATION:            9 Periods

GENERAL OBJECTIVE:    By the end of this topic the learner should be able to explain the reactions of the chemical families in terms of their electronic arrangement.

SPECIFIC OBJECTIVE

CONTENT

Learners should be able to:

·        State the specified reactions of the alkali, alkaline-earth metals and halogens.

·        Describe the difference in reactivity within these chemical families

·        State the properties of noble gas family and its un-reactivity.

·        Predict the reactions and reactivity of elements within each family on qualitative basis.

 

 

 

·        Reaction of alkali metals (Li, Na, K) with air, water and chlorine.

·        Reaction of alkaline- earth metals (Ca, Mg,) with air, water, chlorine and dilute acids.

·         Reaction of halogens (Cl2, Br2, I2) with sodium, water (bleaching action), zinc powder, sodium hydroxide solution.

·        Noble gases.

-         recognize their low reactivity based on their electronic configuration

·        Note: Word equation should be used though formulae of simple compounds and elements may be given.

 


TOPIC 17:         BONDING         DURATION:              6 Periods

GENERAL OBJECTIVE:    By the end of this topic the learner should be able to differentiate between electrovalent, covalent, dative and metallic bonding

SPECIFIC OBJECTIVE

CONTENT

Learners should be able to:

·        Define bonding.

·        Describe the formation of:

-         electrovalent bond.

-         covalent bond.

-         metallic bond

·        Identify different elements which form the above bonds.

 

 

 

·        Definition of bonding.

·        Description of electrovalent, covalent, dative and metallic bonding.

·        Differences between electrovalent, covalent, metallic and dative bonding.

 


 

TOPIC 18:         CHEMICAL EQUATIONS DURATION:           9 Periods

GENERAL OBJECTIVE: By the end of this topic the learner should be able to write balanced equations.

SPECIFIC OBJECTIVE

CONTENT

Learners should be able to:

·        Define word equation.

·        Write word equations.

·        Define formulae equation.

·        Write formulae equations.

·        Balance formulae equations.

 

 

 

·        Definition of word equation and formulae equation.

·        Word equations.

·        Formulae (chemical) equations.

·        Balancing formulae (chemical equation.

 


 

TERM:  III

 

TOPIC 19:         ACIDS, BASES AND INDICATORS  DURATION:              15 Periods

 

GENERAL OBJECTIVE: By the end of this topic the learner should be able to differentiate between acids and bases by use of indicators, and outline the application of acid-base neutralization reactions.

 

SPECIFIC OBJECTIVE

CONTENT

learners should be able to:

·        Define an acid, base and indicator.

·        Prepare and use plant extracts as acid – base indicators.

·        Use universal indicator to determine the ph of solution.

·        State characteristics of acids and bases.

·        Give examples of acids and bases.

·        Outline some applications of acid – base neutralization.

 

 

 

·        Definition of acid, base and indicator.

·        Indicators
- preparing and using indicators. (flower, extracts as simple indicators.)
- universal indicator (ph scale.)

·        Acidic, neutral and basic/alkaline solution.

·        Strength of acids and bases.

·        Simple properties of mineral acids. test solutions: nh4cl,

      (nh4)2 so4, nh3, naoh, h2so4,     etc.)

·        Neutralization reactions of acids and bases.

·        application of acid – base neutralization reactions

 


TOPIC 20: SALTS (IONIC COMPOUNDS) DURATION:         9 Periods

GENERAL OBJECTIVE:    By the end of this topic the learner should be able to prepare simple salts in the laboratory using the appropriate method.

SPECIFIC OBJECTIVE

CONTENT

Learners should be able to:

·        Define salt.

·        Identify soluble and insoluble salts.

·        Select an appropriate method for preparation of a particular salt.

·        Explain the terms solution, saturated solution, crystallization, neutralization and precipitation.

·        Describe and explain from experimental observations, the action of heat on various salts.

 

 

 

·        Definition of salt.

·        Normal salts and acid salts.

·        Soluble and insoluble salts.

·        Solution.

·        Crystals.

·        Crystallization by evaporation.

·        Preparation of soluble salts.

·        Preparation of insoluble salts-double decomposition.

·        Preparation of salts by direct synthesis.

·        Hydrated salts.

·        The effect of heat on salts.

 


 

TOPIC 21:         THE EFFECT OF ELECTRICITY ON SUBSTANCES                           DURATION:         6 Periods

GENERAL OBJECTIVE:    By the end of this topic the learner should be able to recognize that electrolysis is a means of obtaining elements from chemical compounds.

SPECIFIC OBJECTIVE

CONTENT

Learners should be able to:

·        Define conductor/non-conductor and electrolyte/ non-electrolyte.

·        State the relationship between electrolytes, non-electrolytes and the particles they contain (ions, molecules).

·        Name the products of electrolysis of simple binary electrolytes.

·        Explain that, electrolysis is a means of obtaining elements from chemical compounds.

 

 

 

·        Definition of conductor, non-conductor, electrolyte and non – electrolyte.

·        Definition of cathode and anode.

·        Which substances conduct

·        Tests for conduction by solids (metals, non-metals, plastic, wood).

·        Solution: sugar, urea, sodium chloride and copper (II) chloride, dilute mineral acids and molten substances.

·        Electrolysis of ionic compounds (CuCl2, HCl, PbBr2.)