Flashcards
C1 Limestone and Building Materials
Cards in this deck (15)
- 1What is Limestone?A sedimentary rock mainly made up of the compound Calcium Carbonate.
- 2What is the chemical formula of calcium carbonate?CaCO3
- 3How do you obtain Limestone?Through quarries
- 4What happens to CaCO3 when it thermally decomposes?Calcium oxide and carbon dioxide are formed
- 5What happens in general when metal carbonates undergo thermal decomposition?A metal oxide and carbon dioxide is produced
- 6What do calcium oxide and water form?Calcium hydroxide
- 7What is calcium hydroxide?A strong alkali
- 8What else is calcium hydroxide solution known as?Limewater
- 9What do calcium hydroxide and carbon dioxide form?Calcium Carbonate
- 10How do you test whether a gas is CO2 gas?By the reaction with calcium hydroxide
- 11How do you produce dry cement?Powdered limestone and powdered clay are roasted in a rotary kiln
- 12How is mortar produced?The cement is mixed with sand and water
- 13What is mortar used for?To hold together bricks and stone during building
- 14How is concrete produced?Cement is mixed with water, sand and gravel (crushed rock)
- 15What happens when metal carbonates (e.g. calcium carbonate) react with acids?A salt, water and carbon dioxide gas is produced