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Schemes of Work
QCA

Science at key stage 3    (Year 7)

Unit 7E: Acids and alkalis
Section 5: a. What happens when an acid is added to an alkali?

QCA

Objectives

Children should learn:
  • that acids and alkalis are used in a range of everyday situations
  • how to find information, eg using contents, index, glossary, key words, hotlinks
  • to select and note appropriate information about uses and effects of acids and alkali

Activities

Outcomes

Children:
  • Ask pupils to use a range of reference sources including advertisements to find information about the use of acids and alkalis in a range of everyday situations, eg hair and skin care, treatment of stings and bites, treatment of indigestion, food preservation, treatment of soil. Ask them to find out how living things use acids, eg ants, nettles, humans in digestion. Agree with pupils key words they need to use and remind them how to use an index, glossary or search facility. Ask them to identify and note key points about the range of pH used and potential harmful effects, and to explain these to other pupils either orally or by contributing to an information folder.
  • identify uses of acids and alkalis and the benefits and potential hazards of these
  • communicate clearly key points about a particular use of acids or alkalis

Points to note

  • Advertisements for skin-care and hair-care products could be used to introduce this activity.
  • Most pupils will need to be guided towards suitable sources of information, eg websites such as www.miamisci.org. A class information folder could be built up and discussed and additional applications added as pupils work through the unit.

Sections in this unit

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This unit is divided into sections. Each section contains a sequence of activities with related objectives and outcomes. You can view this unit by moving through the sections or print/download the whole unit.
1. a. What are acids and alkalis like and where do we use them?
2. b. What are acids and alkalis like and where do we use them?
3. How can acids and alkalis be identified and distinguished from each other?
4. Is there a range of acidity and alkalinity?
5. a. What happens when an acid is added to an alkali?
6. b. What happens when an acid is added to an alkali?
7. Checking progress
8. Where is neutralisation important?
9. Reviewing work