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Lesson 39: Metal Oxides and Non-metal Oxides Acidic vs basic oxides Reactions with water Environmental link
Year 8 • Chemistry
Metal Oxides and Non-metal Oxides
In this lesson, students learn the difference between metal oxides and non-metal oxides, understand which are acidic or basic, explore their reactions with water, and link these ideas to environmental issues like acid rain.
Lesson Objectives
- Identify metal oxides and non-metal oxides.
- Distinguish between acidic and basic oxides.
- Describe reactions of oxides with water.
- Explain environmental impacts of oxides.
1. What Are Oxides?
An oxide is a compound that contains oxygen combined with another element.
[ Image Placeholder – Oxide Formation ]
Examples:
• Magnesium oxide (MgO) – metal oxide
• Carbon dioxide (CO₂) – non-metal oxide
• Magnesium oxide (MgO) – metal oxide
• Carbon dioxide (CO₂) – non-metal oxide
2. Metal Oxides (Basic Oxides)
Most metal oxides are basic.
They can neutralise acids.
[ Image Placeholder – Metal Oxide Reaction ]
Examples:
• Magnesium oxide
• Calcium oxide
• Magnesium oxide
• Calcium oxide
Reaction with water:
• Forms alkaline solutions
3. Non-metal Oxides (Acidic Oxides)
Most non-metal oxides are acidic.
They can form acids when dissolved in water.
[ Image Placeholder – Non-metal Oxide Reaction ]
Examples:
• Carbon dioxide → carbonic acid
• Sulfur dioxide → sulfuric acid
• Carbon dioxide → carbonic acid
• Sulfur dioxide → sulfuric acid
4. Environmental Link
Some non-metal oxides released into the air cause environmental problems.
[ Image Placeholder – Pollution and Acid Rain ]
Environmental effects:
• Acid rain damages plants and buildings
• Metal oxides can reduce acidity in soil
• Pollution control reduces oxide emissions
• Acid rain damages plants and buildings
• Metal oxides can reduce acidity in soil
• Pollution control reduces oxide emissions
Practice Questions
A. Fill in the Blanks
- An oxide contains oxygen and another __________.
- Metal oxides are usually __________.
- Non-metal oxides are usually __________.
- Carbon dioxide is a __________ oxide.
- Some oxides cause __________ rain.
B. True or False
- All oxides contain oxygen.
- Metal oxides form acids in water.
- Non-metal oxides can form acids.
- Oxides can affect the environment.
- Calcium oxide is a metal oxide.
C. Short Answer
- What is an oxide?
- Give one example of a metal oxide.
- Give one example of a non-metal oxide.
- Why is sulfur dioxide harmful?
- How can pollution be reduced?
✅ Show Answer Key
A. Fill in the Blanks
- element
- basic
- acidic
- non-metal
- acid
B. True or False
- True
- False
- True
- True
- True
C. Short Answer
- A compound containing oxygen.
- Magnesium oxide.
- Carbon dioxide.
- It forms acid rain.
- Reduce emissions / use clean energy.
© Aviate Learning – Metal and Non-metal Oxides (Year 8)