A measure of the hydrogen ion (H⁺) concentration in a solution.

A chemical reaction between an acid and base to produce a neutral solution of a metal salt and water.

A substance that neutralises an acid to form a salt and water.

Refers to a measurement of quantity. A numerical value.

Change in pH: practical

Combined science

In the Electrolysis unit, pupils will build on their understanding of chemical reactions to explore the process of electrolysis and its applications.

In the Acids and Bases unit, pupils learned about the properties of acids, bases, and alkalis, and the reactions between them to form salts and water.

This unit explores empirical formulae, balanced chemical and ionic equations, gas identification, acid reactions, and pH as a measure of hydrogen ion concentration. It covers separation techniques and focuses on planning experiments, accurate measurements, safety, and communicating findings.

Making salts

Physical activity and equipment requiring safe use

Match each of the following key terms to the correct definitions.

What happens to the pH of a basic solution when an acid is added?

A reaction that lowers the pH of a solution.

A reaction between an acid and a base to form salt and water.

The process of dissolving a solid in water.

The reaction between an acid and a metal.

How does pH change near the neutralisation point?

the amount of acid required to neutralise the base

What can be determined by plotting pH on a graph during neutralisation?

Which of the following is an example of a base?

What happens to the pH when a base is added to an acidic solution?

to detect whether a substance contains metal ions

to determine the pH of a solution by showing a range of colours

to identify whether a gas is being produced

What is the purpose of Universal Indicator paper?

What does plotting pH changes on a graph help determine?

to ensure reliable and reproducible results

Why is accurate data collection important?

the temperature of the solution increases

What is observed when pH changes around the neutralisation point?

the temperature of the solution has increased

What does a colour change on the Universal Indicator paper indicate?

Content guidance

Risk assessment required - equipment

Adult supervision required

Introduction

What will you need for this lesson?

Are you ready to learn?

Equipment

Content guidance

Supervision

Worksheet