The limestone cycle
Download

The limestone cycle

Advertisement
Download Presentation
Comments
johana
From:
|  
(4290) |   (0) |   (0)
Views: 483 | Added: 20-01-2012
Rate Presentation: 1 0
Description:
Learning Objectives. By the end of the lesson I will be able to:Carry out thermal decomposition of calcium carbonateDraw a flow diagram of the limestone cycleWrite balanced chemical equations for reactions in the limestone cycle . Heating limestone. When limestone (calcium carbonate) is heated, it breaks down (decomposes)When something breaks down with heat we call this reaction
The limestone cycle

An Image/Link below is provided (as is) to

Download Policy: Content on the Website is provided to you AS IS for your information and personal use only and may not be sold or licensed nor shared on other sites. SlideServe reserves the right to change this policy at anytime. While downloading, If for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.











- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -




1. The limestone cycle

2. Learning Objectives By the end of the lesson I will be able to: Carry out thermal decomposition of calcium carbonate Draw a flow diagram of the limestone cycle Write balanced chemical equations for reactions in the limestone cycle

3. Heating limestone When limestone (calcium carbonate) is heated, it breaks down (decomposes) When something breaks down with heat we call this reaction? Thermal decomposition Calcium carbonate breaks down into calcium oxide (quicklime) and carbon dioxide

4. Thermal decomposition of limestone Calcium heat calcium carbon Carbonate oxide dioxide

5. Reacting quicklime with water Calcium oxide (quicklime) is a strong alkali It reacts with water to form calcium hydroxide Ca(OH)2 Calcium hydroxide is also known as slaked lime

6. Uses for quicklime Making cement, mortar and concrete. Decomposing rotting bodies in mass graves and reducing the smell !

7. Making Slaked Lime calcium + water calcium oxide hydroxide CaO + H2O Ca(OH)2

8. Uses for slaked lime To neutralise acidic soils, and to break up the soil so that plants can grow well To neutralise lakes which have been polluted by acid rain

9. Limewater Limewater is a solution of calcium hydroxide It is used to test for carbon dioxide We breathe out a lot of carbon dioxide If we blow through a straw into limewater it will change from clear to milky-white The substance formed in this reaction is insoluble calcium carbonate

10. Testing for carbon dioxide calcium + carbon calcium + water hydroxide dioxide carbonate Ca(OH)2 + CO2 CaCO3 + H2O

11. The Limestone Cycle These reactions all make up the limestone cycle.

12. Task: Use the worksheet called ?The Limestone Cycle? - fill in the gaps and complete the equations for the reactions of limestone. Stick into your books.


Other Related Presentations

Copyright © 2014 SlideServe. All rights reserved | Powered By DigitalOfficePro