548706
Descrição
FlashCards por Louisa Wania, atualizado more than 1 year ago
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Criado por Louisa Wania
quase 11 anos atrás
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| Questão | Responda |
| What is Limestone? | A sedimentary rock mainly made up of the compound Calcium Carbonate. |
| What is the chemical formula of calcium carbonate? | CaCO3 |
| How do you obtain Limestone? | Through quarries |
| What happens to CaCO3 when it thermally decomposes? | Calcium oxide and carbon dioxide are formed |
| What happens in general when metal carbonates undergo thermal decomposition? | A metal oxide and carbon dioxide is produced |
| What do calcium oxide and water form? | Calcium hydroxide |
| What is calcium hydroxide? | A strong alkali |
| What else is calcium hydroxide solution known as? | Limewater |
| What do calcium hydroxide and carbon dioxide form? | Calcium Carbonate |
| How do you test whether a gas is CO2 gas? | By the reaction with calcium hydroxide |
| How do you produce dry cement? | Powdered limestone and powdered clay are roasted in a rotary kiln |
| How is mortar produced? | The cement is mixed with sand and water |
| What is mortar used for? | To hold together bricks and stone during building |
| How is concrete produced? | Cement is mixed with water, sand and gravel (crushed rock) |
| What happens when metal carbonates (e.g. calcium carbonate) react with acids? | A salt, water and carbon dioxide gas is produced |
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