Form 3 PMR Science Calcium compounds

2. List of Calcium Compounds
• Calcium Carbonate (Limestone)
• Calcium Oxide (Quicklime)
• Calcium Hydroxide (Slaked Lime)

3. Natural Calcium Carbonate
Seashells

4. Calcium carbonate – Chalk

5. Natural Calcium Carbonate - Marble

6. Calcium carbonate - Marble

7. Natural marble mountain

8. Natural Calcium Carbonate

11. Conversion of Calcium Compounds
Calcium Carbonate (Limestone)
Calcium Oxide (Quicklime) + CO2
Calcium Hydroxide (Slaked Lime)
Calcium Hydroxide Solution (Lime Water)

14. Characteristics and Uses of
Calcium Carbonate
• Reacts with Acid releasing Carbon Dioxide Gas
• Hard and Insoluble in Water
• Breaks down to Calcium Oxide when Heated
Uses
– Antacids, Calcium Supplements
– Marble tiles, table and floor
– Cement (Calcium carbonate + Clay + Water)
– Make Quicklime
– Extract iron from haematite ore
– Make glass

15. Heating Calcium Carbonate
• Calcium carbonate → Calcium oxide + Carbon dioxide gas

16. Reaction of
Acid and Calcium Carbonate
Hydrochloric acid + Calcium carbonate → Calcium chloride + Carbon dioxide
Sulphuric acid + Calcium carbonate → Calcium sulphate + Carbon dioxide

17. Characteristics and Uses of
Calcium Oxide
• Also Called quicklime
• Produced when calcium carbonate is heated
• Do not break down when heated
• Dissolves in water to form calcium hydroxide
• Turns red litmus blue
• Uses
– Prepare slaked lime
– Make calcium carbide
– As drying agent for ammonia gas

18. Formation of Slaked Lime
Calcium oxide + Water → Calcium hydroxide + Heat energy

19. Characteristics and Uses of
Calcium Hydroxide (Solid)
• Also called slaked lime
• Strong base
• Turns red litmus blue
• Reduce acidity of soil
• Make soda lime
– Neutralize the acidity of water in water treatment
plant
• Prepare lime water to test for presence of carbon
dioxide gas

20. Reduce acidity of soil

21. Characteristics and Uses of
Lime water
• Turns red litmus blue
• Alkaline
• pH>7
• To test for the presence of carbon dioxide gas
• To treat acid burns

22. Treating acid burns