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Lesson 37: Acids + Metals / Alkalis Salt + hydrogen Salt + water Word equations (intro)
Year 8 • Chemistry
Acids Reacting with Metals and Alkalis
In this lesson, students learn how acids react with metals and alkalis, identify the products formed, and write simple word equations to describe these reactions.
Lesson Objectives
- Describe reactions between acids and metals.
- Describe reactions between acids and alkalis.
- Identify products of these reactions.
- Write simple word equations.
1. Acids and Metals
When an acid reacts with a metal, a chemical reaction takes place.
[ Image Placeholder – Acid and Metal Reaction ]
Products formed:
• A salt
• Hydrogen gas (bubbling observed)
• A salt
• Hydrogen gas (bubbling observed)
Example:
Magnesium reacts with hydrochloric acid producing bubbles of hydrogen.
2. Acids and Alkalis (Neutralisation)
When an acid reacts with an alkali, the reaction is called neutralisation.
[ Image Placeholder – Acid and Alkali Reaction ]
Products formed:
• A salt
• Water
• A salt
• Water
This reaction helps reduce acidity.
3. Salt + Hydrogen / Salt + Water
The products depend on what the acid reacts with.
[ Image Placeholder – Reaction Products Summary ]
• Acid + metal → salt + hydrogen
• Acid + alkali → salt + water
• Acid + alkali → salt + water
4. Word Equations (Intro)
A word equation describes a reaction using words instead of symbols.
[ Image Placeholder – Word Equation Format ]
Examples:
• Acid + metal → salt + hydrogen
• Acid + alkali → salt + water
• Acid + metal → salt + hydrogen
• Acid + alkali → salt + water
Practice Questions
A. Fill in the Blanks
- Acids reacting with metals produce __________ gas.
- A neutralisation reaction produces salt and __________.
- The reaction of acid and alkali is called __________.
- Word equations use __________ instead of symbols.
- Acid + metal forms a __________.
B. True or False
- Acid + metal produces water.
- Hydrogen gas causes bubbling.
- Neutralisation reduces acidity.
- Word equations use chemical symbols.
- Salt is formed in both reactions.
C. Short Answer
- What gas is formed when acids react with metals?
- What is neutralisation?
- What are the products of acid and alkali?
- Why are word equations useful?
- Give one example of an acid.
✅ Show Answer Key
A. Fill in the Blanks
- hydrogen
- water
- neutralisation
- words
- salt
B. True or False
- False
- True
- True
- False
- True
C. Short Answer
- Hydrogen.
- Reaction between acid and alkali.
- Salt and water.
- They clearly describe reactions.
- Hydrochloric acid / sulfuric acid.
© Aviate Learning – Acids and Reactions (Year 8)