Write an equation for the reaction that takes place when iron ore is reduced by pure carbon at a high temperature in the hottest part of the blast...

Commonly used iron ores are hematite and magnetite. These ores are processed in blast furnace using coke (which provides both the heat and the reducing agent). In the hottest part of the furnace, temperatures are around 1900 degree Celsius. At these high temperatures, pure carbon reacts with iron oxide to form pure iron. The chemical equation for this reaction is given as:

FeO + C -> Fe + CO

In this reaction, pure carbon is the reducing agent and reduces iron oxide to iron and also forms carbon monoxide.

In other parts of the furnace, at lower temperatures (of around 1000 degree Celsius), carbon monoxide is the reducing agent and reduces iron oxide to iron according to the following chemical reaction:

FeO + CO -> Fe + CO2

Hope this helps.