Slide 1: Physical Properties Of Iron

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Corrected Text
Slide 1: Properties of Iron

Learning Objectives

At the end of this class session, you will have learned about
• Physical properties of Iron
• Chemical properties of Iron
Slide 2: Introduction
After aluminium, iron is the most abundant metal. Iron occurs in the combined state as oxides, sulphides and carbonates.
Slide 3: Explanation
Physical properties of Iron
Teacher: Good morning, students.

Student: Good morning, ma’am.

Teacher: Today we are going to learn about the physical properties of iron.

Can anyone state a physical property of iron?

Student: Iron is a grayish white color metal, ma’am.

Teacher: Good.

Iron is a heavy metal with a specific gravity of 7.9 g/cc and it has high tensility, malleability and ductility.
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Teacher: Very Good.

Another important property of iron is it can be magnetized.

Let us see an animation regarding this.
Animation_1_Physical properties of Iron
2. Physical properties:

3. 1. Iron is a heavy metal with a specific gravity of 7.9 g/cc.

4. 2. It is a grayish white color metal.

5. 3. It has high tensility, malleability and ductility.

6. 4. Iron is a good conductor of heat and electricity.

7. 5. Iron can be magnetized.

Chemical properties
Teacher: Let us see about the chemical properties of iron.

Let us first see about the reaction of iron with air or oxygen.

Magnetic oxide is produced when iron is heated in air.

Can anyone state the reaction of iron with air or oxygen?

Student: Ma’am, the reaction can be given as:

3Fe + 2O2→ Fe3O4 (black).

Teacher: Good.

Next, we shall see about the reaction of iron with moist air.

A layer of brown hydrated ferric oxide is formed when iron reacts with moist air.

Can anyone state the reaction of iron with moist air?

Student: Ma’am, the reaction can be given as:

4Fe + 3O2 + 3H2O →Fe2O3.3H2O(Rust).

Teacher: Very Good.

Can anyone name the product formed in the above reaction?

Student: Rust is the product formed,
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The reaction is given as:

2Fe + 6H2SO4 →Fe2(SO4)3 + 3SO2 + 6H2O.

Student: Ma’am, which compound is formed when iron reacts with dilute nitric acid?

Teacher: Ferrous nitrate is formed when iron reacts with dilute nitric acid.

The reaction is given as:

4Fe + 10HNO3 →4Fe(NO3)2 + NH4NO3 + 3H2O.

With concentrated HNO3, iron becomes passive or inert. Does anyone know the reason?

Student: No, ma’am.

Teacher: It is because a layer of iron oxide is formed on the iron’s surface.

Let us see an animation regarding this.

Animation 4_ Reaction with acids
20. 5. Reaction with acids:

21. Hydrogen gas is produced when iron combine with dilute HCl and dilute H2SO4.
Fe + 2HCl → FeCl2 + H2↑
Fe + H2SO4→ FeSO4 + H2↑

22. With concentrated H2SO4, ferric sulphate is formed.
2Fe + 6H2SO4 → Fe2(SO4)3 + 3SO2 + 6H2O

23. With dilute HNO3, ferrous nitrate is formed.
4Fe + 10HNO3 →4Fe(NO3)2 + NH4NO3 + 3H2O

24. With concentrated HNO3, iron becomes passive or inert because a layer of iron oxide is formed on its surface.
Slide 4:

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