C - Limestone Flashcards
Limestone is mainly…
CALCIUM CARBONATE
What is thermal decomposition?
When one substance is HEATED and therefore CHEMICALLY CHANGES into at LEAST 2 new substances.
Limestone reacts with… (3)
- Heat
- Acid
- Water
When limestone is thermally decomposed, it produces…
- Calcium oxide
* Carbon dioxide
Calcium oxide and water produce _________ which is useful to test whether ________ is present. This is the ______test.
- Calcium Hydroxide
- Carbon dioxide
- Limewater
Limestone can be used as building material such as… (2)
- Mortar
- Cement
- Concrete
Extracting limestone is called…
Quarrying
What are some ( at least 2 ) disadvantages of quarrying limestone?
- Huge ugly holes which permanently change the landscape
- Noise and dust pollution
- Destroys habitats
- The limestone needs to be transported away from the quarry which causes more noise and pollution
- Lots of energy, lots of money
What are some ( at least 2 ) advantages of quarrying limestone?
- It’s useful - it provides things that people want e.g paints, houses, roads,medicines
- Neutralises acidic soil
- Provides jobs for people and brings more money to the local economy
- Neutralises sulfur dioxide
- Landscaping and restoration of the area is normally required as part of planning permission
What is the symbol for calcium carbonate?
CaCO3 - little 3
What’s the SYMBOL equation for Calcium carbonate when it’s thermally decomposing
CaCO3 ➡️ CaO + CO2
What’s the WORDY equation for Calcium carbonate when it’s thermally decomposing
Calcium carbonate ➡️ calcium oxide + carbon dioxide
What is the test that you do for detecting CO2
Limewater test
Describe the lime water test
- calcium hydroxide solution is put into a test tube
- A straw is exhaled into to create carbon dioxide to flow through the solution
- This produces a cloudy white precipitate of calcium carbonate
What’s slaked lime?
Another word for calcium hydroxide
