Ionic bonds + blast furnace

Ionic bonds

Strong electrostatic attraction between oppositely charged ions (metals and non metals)

They form bonds to…

fill their outer shell

Structure of ionic bonds :

Giant lattice structures with a regular arrangement of alternating positive and negative ions

Ionic bonds have properties such as…

High melting and boiling points

Good electrical conductivity when aqueous or molten

Generally soluble in water

State that…

Iron from hematite is extracted by reduction of iron (iii) oxide in the blast furnace

Step 1 (ex):

Burning of coke (carbon) to provide heat and produce carbon dioxide

Step 1 (eq):

C + O₂ —> CO₂

Step 2 (ex):

The reduction of carbon dioxide to carbon monoxide

Step 2 (eq):

C + CO₂ —> 2CO

Step 3 (ex):

Carbon monoxide reduces iron (iii) oxide from the ore to iron

Step 3 (eq):

Fe₂O₃+ 3CO —> 2Fe +3CO₂

The formation of slag

Ca + SiO₂ —> CaSiO₃