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Description
Flashcards by x_clairey_x, updated more than 1 year ago
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Created by x_clairey_x
over 11 years ago
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| Question | Answer |
| What are the uses of limestone? | Can be used to make cement for concrete |
| What is limestone mainly made out of? | Calcium carbonate |
| What happens when we heat limestone? | Calcium carbonate breaks down to make calcium oxide and carbon dioxide, this reaction is called thermal decomposition |
| What do carbonates produce when reacted with dilute acid? | A salt, carbon dioxide and water |
| What is the test for carbon dioxide gas? | Use limewater, if it turns cloudy then carbon dioxide is present |
| When water is added to calcium oxide, what does it become? | Calcium hydroxide |
| What does an alkaline do to acids? | Neutralises them |
| What is the limestone reaction cycle? | |
| How is mortar made? | By mixing sand, cement and water together |
| How is cement made? | By mixing limestone and clay in a kiln |
| How is concrete made? | By mixing sand and water with aggregate (crushed rocks or small stones) |
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