Year 7 · Science · Acids and alkalis · Lesson 3

Acid reactions in everyday life

Everyday neutralisation (indigestion, soil, toothpaste, lakes) and how acids react with metals and carbonates, with tests for hydrogen and carbon dioxide.

16-minute video lesson

Teaching, worked examples and 20 practice questions solved step by step.

Watch free for a month

What your child will learn

Describe everyday uses of neutralisation
Predict products of acid reactions
Describe gas tests
Write word equations

The method

What reacts?
Metal.
Carbonate.
Alkali.

Key words: neutralisation, hydrogen, carbon dioxide, carbonate, limewater, squeaky pop.

Worked examples

The first three practice questions from the lesson, with every step.

Question 1

What causes indigestion?

Step 1: Stomach

Answer: too much stomach acid

Question 2

What do indigestion tablets contain?

Step 1: Base

Answer: a base (e.g. a carbonate)

Question 3

Why do farmers add lime to soil?

Step 1: Acidic

Answer: to neutralise acidic soil