C1 Unit 2 - Rocks and Building Materials - Mindmap in GCSE Chemistry

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Created by: chickpeatweet
Created on: 24-02-14 17:59

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C1:2 - Rocks and Building Materials
- Limestone
  - Made mainly of calcium carbonate
  - Can be used to make calcium carbonate
    - CaCO3 -> CaO + CO2
    - This is done through Thermal Decomposition
  - Used to make cement by heating it with clay in a kiln. This is ground up into fine powder.
    - Cement can be mixed with sand, aggregate and water to make concrete.
      - Concrete can be reinforced with steel (reinforced concrete) to be used in building structures.
  - The Limestone Cycle
    - Calcium Carbonate (limestone) CaCO3
      - Heat
        Calcium oxide
        Add water
        Calcium hydroxide
        Add more water and filter
        Calcium hydroxide Solution (limewater)
        Add CO2
        Calcium Carbonate (limestone) CaCO3
        Heat
        Calcium oxide
        Add water
        Calcium hydroxide
        Add more water and filter
        Calcium hydroxide Solution (limewater)
        Add CO2
- Reactions of Carbonates
  - All metal Carbonates react in similar ways when heated or when reacted with acids
  - Metal carbonates decompose when heated to produce the metal oxide and carbon dioxide.
    - Example
      - zinc carbonate + heat -> zinc oxide + CO2
  - Carbonates react with acids to make salt, water and carbon dioxide.
    - Example
      - Calcium carbonate + nitric acid -> calcium nitrate + water + carbon dioxide.
    - Limestone is damaged greatly by acid rain as the calcium carbonate in the rock reacts with acids in the rain.
  - Calcium hydroxide (lime water) turns cloudy when carbon dioxide is present.
    - This is because the Calcium Hydroxide reacts with the Carbon Dioxide to produce insoluable Calcium Carbonate

Comments

unnofficialbar

Report Tue 5th December, 2017 @ 14:48

good resource, although i accidentally pressed 1 star sorry about that still a good resource

Rernana

Report Mon 7th June, 2021 @ 19:51

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