Assertion: compound's oxygen | /r/CapableOf | oxidize ferrous iron
Facets:
value: to form hydrated ferric oxide
type: PURPOSE
Source sentences:
text: This process occurs in two steps: first, iron dissolves in the acid solution produced by the moisture and the carbon dioxide of the air, to form ferrous iron and liberate hydrogen; second, oxygen from the air oxidizes the ferrous iron to form hydrated ferric oxide.