Science Key Stage 3: Sc3 – Materials and their properties

Key Skills: Patterns of behaviour

Acids and bases

(3d) to use indicators to classify solutions as acidic, neutral or alkaline and to use the pH scale as a measure of acidity of a solution.

Key Questions:

Solutions can be acidic, alkaline or neutral.

How can an indicator be used to show whether a solution is an acid, an alkali or neutral?

What is pH and what does it tell us about a solution?

How can indicators be used to show whether solutions are acidic or alkaline?

Websites:

The pH factor. http://www.miamisci.org/ph/default.html

A range of experiments all to do with pH.

Sprocket Works - Acid/Base. http://www.sprocketworks.com/shockwave/load.asp?SprMovie=chemacidsbasesweb

An animation that takes a closer look at acid base neutralisation.

Acids and Alkalis. http://www.schoolchem.com/xaa5.htm

A straightforward account of the nature of acids and alkalis.

Acids and Alkalis - Quiz. http://www.quia.com/servlets/quia.activities.tq.PlayQuiz?115129

An interactive multiple choice quiz. Test yourself to see how much you have learnt.

Brain Pop - pH scale. http://www.brainpop.com/science/matter/ph/index.weml

An entertaining movie and quiz exploring the pH scale and neutralisation.

Chem4kids - acids and bases. http://www.kapili.com/chem4kids/index.html

Follow ‘the reactions’ link to find out that acids and bases are everywhere.

Learn.co.uk replacement

Measuring acidity. http://www.learn.co.uk/default.asp?WCI=Lesson&WCU=571

or http://213.219.55.197/default.asp?WCI=Unit&WCU=2964 (Same material - old and new sites)

The colourful world of indicators. Key stage 4 science lesson reviewing the material seen at key stage 3.