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| Questão | Responda |
| What is limestone mainly composed of? | Calcium Carbonate (CaCO3) |
| Where is limestone found and what can it be used for? | It is quarried and it can be used as a building material |
| How can calcium carbonate be decomposed and what does it produce? | Through thermal decomposition. It produces calcium oxide and carbon dioxide |
| What 5 carbonates of metals decompose in a similar way? What basic products are produced? | Magnesium, sodium, zinc, copper and calcium. Metal oxide and carbon dioxide |
| When calcium oxide reacts with water what does it produce? | Calcium hydroxide |
| What is calcium hydroxide and what can it be used for? | It is an alkali and can be used in the neutralisation of acids |
| Why is limewater (a solution of calcium hydroxide in water) used to test for carbon dioxide? | Because it reacts with the carbon dioxide to produce calcium carbonate and turns the water cloudy. |
| Why is limestone damaged by acid rain? What is produced? | Because carbonates react with acids. Carbon dioxide, a salt and water is produced. |
| How is cement made? | Limestone is heated with clay |
| How is mortar and concrete made? | Mortar: Cement is mixed with sand Concrete: Cement is mixed with sand and aggregate |
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