Science KS 3 Unit 7E Acids and alkalis

In this unit pupils:

• learn about acids and alkalis as classes of chemicals with distinct properties and uses.
• use indicators to classify solutions as acidic, alkaline or neutral.
• use the pH scale to compare the acidity and alkalinity of different solutions.
• begin to explore neutralisation.

In scientific enquiry pupils:

• recognise hazards and use information sources to assess risks associated with acids and alkalis.
• make and present qualitative observations.
• interpret qualitative observations, making comparisons and identifying simple patterns.
• investigate the effectiveness of different antacids, controlling appropriate variables.


This unit is expected to take approximately 7 hours.

OTHER RESOURCES

• household acids and alkalis (not bleaches), together with containers
• Hazcards and transport hazard warnings identifying hazards associated with acids and alkalis
• range of plant material from which indicator dyes can be extracted, eg red cabbage, blackcurrants
• pH sensor linked to a computer
• advertisements for products, eg for skin and hair care, which refer to pH
• indigestion remedies
• reference sources, including ICT sources, providing information about domestic and everyday uses/problems relating to acids and alkalis