Limestone & Environment Flashcards
Limestone is mainly:
Calcium Carbonate (CaCO₃)
Limestone is quarried from the ground and used mainly for:
Building Materials
Cement is made by heating _________ with ________ in _________.
- Powdered limestone
- Clay
- Rotary Klin
In blast furnace, limestone is used to __________ found in the iron ore turning it as slag (calcium silicate).
Remove impurities
Lime/Quicklime/Calcium Oxide is produced by ________. This is called ___________.
- Roasting limestone
- Thermal decomposition
Calcium Carbonate (heat)→ Calcium Oxide + Carbon Dioxide CaCO₃ (heat)→ CaO + CO₂
Lime is used to ____________.
Neutralise acid soils
_______ is used with ________ and ______ to make glass by heating.
- Lime
- Sodium carbonate
- Sand
Uses of limestone:
- Neutralise acidic soil
- Concrete (building material)
- Cement (building material)
- Used in glass industry
Disadvantages of limestone:
It will react with acid rain and will wear away over time.
Disadvantages of (chemical) industry?
- Air pollution
- Water pollution
- Land pollution
Reduce the negative impact of (chemical) industry?
- Reuse
* Reduce Recycle