Lesson Notes By Weeks and Term - Senior Secondary 3

Metals and their compounds 4

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TERM׃ IST TERM

WEEK FOUR

Class: Senior Secondary School 3

Age: 17 years

Duration: 40 minutes of 5 periods each

Date:

Subject: Chemistry

Topic: Metals and their Compounds 4

SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to

  1. Discuss the extraction of copper.
  2. Discuss the uses of copper

INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers,

demonstration, videos from source

INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

PRESENTATION

TEACHER’S ACTIVITY

STUDENT’S

ACTIVITY

STEP 1

INTRODUCTION

The teacher explains the extraction process of copper.

 

Students pay

attention

STEP 2

EXPLANATION

Teacher discusses the uses of copper with the students.

Students pay

attention and

participate

 

STEP 3

DEMONSTRATIO

N

Teacher discusses the general reaction of metals, showing samples of various metal ores to the students.

 

Students pay

attention and

participate

STEP 4

NOTE TAKING

The teacher writes a summarized note on the board

 

The students

copy the note in

their books

 

NOTE

METALS AND THEIR COMPOUNDS 4

Extraction of Copper

The extraction of copper involves several chemical reactions. Below are the key equations representing the main steps of copper extraction from its ore, chalcopyrite (CuFeS2):

  1. Roasting:

   CuFeS2 + O2   FeO + CuS + SO2

   Copper sulfide ore (chalcopyrite) is roat in the presence of oxygen. The sulfur in the ore is converted to sulfur dioxide (SO2).

  1. Smelting:

  CuS + O2   CuO +  SO2

    Copper sulfide  is smelt to form copper oxide (CuO) and sulfur dioxide (SO2).

  1. Conversion to Copper Matte:

  CuO + FeS  CuS + FeO

   In the converter, copper oxide reacts with iron sulfide to form copper sulfide and iron oxide.

  1. Blister Copper:

   CuS + O2   Cu + SO2

   The copper sulfide in blister copper is further oxidized to produce copper metal and sulfur dioxide.

  1. Electrorefining:

Cu +  CuSO4  2Cu + SO42-

   Here,  copper anodes are dissolved in copper sulfate electrolyte, and copper is plated onto the cathode.

Uses of copper

Copper has a wide range of applications due to its excellent electrical conductivity, malleability, corrosion resistance, and other favorable properties. The following are some common uses of copper:

  1. Copper is a primary material for electrical wiring and conductors in buildings, power transmission, and electronic devices due to its high electrical conductivity.
  2. Copper is used in various electronic components, including printed circuit boards (PCBs), connectors, and integrated circuits.
  3. Copper is employed in generators, transformers, and power cables for efficient electricity generation and transmission.
  4. Copper is used in the manufacturing of automotive radiators, brake systems, and electrical components in vehicles.
  5. Copper's high thermal conductivity makes it suitable for heat exchangers, air conditioning coils, and refrigeration units.
  6. Copper alloys, such as bronze (copper and tin) and brass (copper and zinc), have various applications, including in musical instruments, statues, and decorative items.
  7. Copper and its compounds serve as catalysts in chemical reactions, particularly in the production of chemicals and plastics.

EVALUATION:  1. Describe the extraction process of copper.

  1. Enumerate 5 uses of copper.

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively