Acids & Bases


Reactions involving acids and bases are quite common and represent an extremely important area of chemistry, encompassing industrial and biological processes. We commonly encounter acids and bases in our every day lives.

Aspects Covered

  1. What are acids and bases?
  2. Explaining acids and bases
  3. Reactions involving acids and bases

Living with Acids
VELS Links
Learning focus
Science Knowledge and Understanding
Science at work and links to other domains
Students begin to write chemical equations using symbols (level 6). Design and conduct scientific investigations of their choice in ways that lead to the collection, interpretation and presentation of valid data. (level 6)
Students explain the behaviour and properties of materials in terms of their constituent particles and the forces holding them together. (level 6)
Students evaluate the appropriateness of experimental design and methodology used to investigate their predictions. (Level 5)

Student Outcomes
Text References
Elements of VELS Framework
Examples of evidence include that the student:

uses chemical formulae and equations to represent and describe particular chemical changes
p 4, 8, 12, 14, 17
uses the particle model to explain the effects of acids on carbonates
p 4, 8

distinguishes between acids, bases and alkalis
p 3-4

demonstrates understanding of the terms dilute and concentrated
p 3

gives examples of the importance of pH in everyday life
p 4-8, 9-15

uses examples to explain how ions can be formed from atoms
p 8

explains acids and bases it terms of H+ and OH- ions
p 8

describes what happens to an ionic compound when it dissolves in water

writes word equations for the reactions of acids
p 4, 12

gives examples of metal salts and how they are formed
p 17

gives everyday examples of neutralisation
p 16-17

investigates personal and environmental safety of household chemicals (acids and alkalis) and how they should be stored
p 4
Matter and Futures (F)
discusses viewpoints about the issue of acid rain
p 14-15

correctly uses pH paper and universal indicator solution
p 6-7
Planning and Organising
designs a test to compare the effectiveness of different antacids
p 9

observes the reactions of acids with metals and with carbonates
p 4, 9, 15
Using Information
applies a series of logical steps to reach a conclusion

Solving Problems
uses a concept map to demonstrate their understanding of acids and bases

Thinking (T)

Acid Base Assessment

Year 9 Science

Topic Planner and Marksheet
Topic: Acids & Bases / Useful Materials (Ch 1 & 2)

part a
Acids & Bases:
Write 10 Questions and Answers covering Chapter 1

part b
Useful Materials:
Write 10 Questions and Answers covering Chapter 2


any three of:
- Using Red cabbage indicator to test household substances (p5)

- Comparing Antacids (p9)

- Making Copper Sulfate (p18)

- Makiing alcohol (p23)

- Making Soap (p25)

- Making Rayon Thread (p35)


Acid Bases Assignment


Project on an everyday substance (eg Plastic, Soap/Detergents, Hydrocarbons)


Practical Investigation on Reactions (by negotiation)


Test on Chapters 1&2

Bookwork, Attitude, Conduct
(out of 10)

/20 Marks

/30 Marks

/20 Marks

/30 Marks

Online Resources:

Introduction to Key Terms & Concepts

There are several methods of defining acids and bases. While these definitions don't contradict each other, they do vary in how inclusive they are.
Find out more by visiting the following link:

How To Build a Baking Soda Volcano

Okay, the baking soda volcano is the kitchen equivalent of a volcano, not a real one. It's cool all the same! The baking soda volcano is also more or less non-toxic, which adds to its appeal.
Difficulty: Average
Time Required: 30 minutes

Here's How:
Acid Base Quiz (Studywiz)