1. © www.chemsheets.co.uk GCSE 026 08-April-13

2. Limestone quarry

3. Topley Pike quarry in the Peak District National Park

4. All built with limestone

5. Chippings in roads Chippings Paving To neutralise acidic lakes

6. CaCO 3  CaO + CO 2 calcium carbonate calcium oxide (limestone) (quicklime) CaO + H 2 O  Ca(OH) 2 calcium oxide calcium hydroxide (quicklime) (slaked lime)

7. Lime kilns (old and new)

8. Farmer spreading calcium hydroxide to neutralise acidic soil

9. Testing for CO 2 with limewater (calcium hydroxide solution) Testing for CO 2 with limewater Limewater = calcium hydroxide solution

10. CEMENT Powdered limestone + Powdered clay Heat in rotary kiln

11. CONCRETE Cement + Sand + Water + Crushed rock

12. Concrete can break if stretched or bent

13. Steel reinforced concrete

15. Bahai Lotus Temple in Delhi, India – made of concrete (1980)

16. MORTAR Cement + Sand + Water

17. Mortar weathers and brickwork must be re-pointed.