Structure of Ionic Compounds Flashcards
What is the chemical name of iron?
Hydrated iron (III) oxide
What is the chemical formula for iron?
Fe2O3
What is an ore?
A substance found in an impure state that contains metal compounds found in nature.
What method is used to get a metal in its pure state if it’s..
a) more reactive than carbon?
b) less reactive than carbon?
a) electrolysis
b) use carbon to displace the other metal
What are the necessary conditions for rusting?
Iron must be in the presence of water and oxygen.
What does iron look like?
Red-brown solid.
What is corrosion?
Corrosion is the wearing down of a substance.
What is a barrier method? Give some examples.
A physical layer that prevents water and oxygen from reacting with Fe. Some examples include paint, oil and plastic coatings.
What is galvanising? Give some examples.
A form of protection which involves both sacrificial protection and a physical barrier. For example, coating an iron boat with zinc. It’s sacrificial protection because the oxygen will react zinc and it’s a physical barrier because it’s fully coated.
What is sacrificial protection? Give some examples.
A form of protection where iron is protected by other more reactive metals, which oxygen will react with more preferably. For example, blocks of magnesium or zinc or scrap pieces.
