Carbonates

Question 1

manufacture of lime (calcium oxide) from calcium carbonate (limestone) in terms of thermal decomposition

Answer 1

• Calcium​ ​carbonate​ ​–(heat)->​ ​calcium​ ​oxide​ ​+​ ​carbon dioxide
• CaCO​3​​ ​–(heat)->​ ​CaO​ ​+​ ​CO2​

Question 2

uses of lime and slaked lime

Answer 2

● Treating​ ​acidic​ ​soil

● Neutralising​ ​acidic​ ​industrial​ ​waste​ ​products

Question 3

uses of calcium carbonate in the manufacture of iron and cement

Answer 3

● Iron​ ​:
o Calcium​ ​carbonate​ ​helps​ ​to​ ​remove​ ​acidic​ ​impurities​ ​from​ ​the​ ​iron​ ​by reacting​ ​with​ ​them​ ​to​ ​form​ ​molten​ ​slag
● Cement​ ​:
o Heat​ ​powdered​ ​limestone​ ​with​ ​clay
o It​ ​is​ ​an​ ​ingredient​ ​in​ ​mortar​ ​and​ ​concrete​