CHEMISTRY Unit 1a

Chemistry Unit 1a:

  • Atoms & Elements
  • Periodic Table
  • Compounds and Mixtures
  • Balancing Equations
  • Using Limestone
  • Properties Metal
  • Reactivity Series
  • Making Metals
  • Fractional Distillations
  • Properties of Crude Oil 
  • Crude Oil as fuel
  • Environmental Problems
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  • Created by: Rocky-San
  • Created on: 20-02-11 19:02

Using Limestone

 

Limestone:

- The limestone is quarried out of the ground

- It is made from crushed sea shells and fossils

- It is used to make blocks for buildings

- Insoluble in water

- Acid rain can affect it by dissolving Limestone away

(http://www.google.co.uk/imgres?imgurl=http://resources.schoolscience.co.uk/SPE/old/knowl/images/acidrain.jpg&imgrefurl=http://resources.schoolscience.co.uk/SPE/old/knowl/4/sulphur.html&usg=__7m-yLj4cggZP_y0uh6k9W6P6Vco=&h=374&w=300&sz=16&hl=en&start=0&zoom=1&tbnid=ac7UKborS8tNBM:&tbnh=159&tbnw=131&ei=K2JhTfGOEsXZgQejj8S8AQ&prev=/images%3Fq%3DAcid%2BRain%2BLimestone%26um%3D1%26hl%3Den%26biw%3D1280%26bih%3D642%26tbs%3Disch:1&um=1&itbs=1&iact=hc&vpx=133&vpy=99&dur=940&hovh=251&hovw=201&tx=159&ty=130&oei=K2JhTfGOEsXZgQejj8S8AQ&page=1&ndsp=18&ved=1t:429,r:0,s:0)

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Calcium Carbonate

Limestone is Calcium Carbonate (CaCO3)

When it is heated, it thermally decomposes (breaks down), to make Calcium Oxide and Carbon Dioxide.

Calcium Carbonate ---> Calcium Oxide + Carbon Dioxide

Limestone Quick Lime

CaCO3  ----------------------> CaO                 + CO2

QUICKLIME ---> SLAKED LIME Slaked Lime:

Quicklime + Water -----> Slaked Lime  An Alkali used to neutralise soils

CaO         + H2O   -----> Ca(OH)2      Slake Lime neutralises much faster

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Limestone- Useful Things

 

CEMENT: Limestone is heated in a kiln with powdered clay to make cement

 

MORTAR: Cement is mixed with sand and water to make mortar.

Mortar is used to stick bricks together.

 

CONCRETE: Mix cement with sand, water and gravel.


GLASS: Limestone is heated with sand, and sodium Carbonate

 

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Comments

nush

Really Good!

Thank you <3

Jazzy

thankss :)

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