C2.2 Redox Flashcards
What is a redox reaction?
A reaction in which both oxidation and reduction occur
What is oxidation?
The addition of oxygen and/or the removal of hydrogen
What is reduction?
The reduction of oxygen or the gain of hydrogen
What is the chemical name for rust?
Hydrated Iron (III) Oxide
In a sealed test tube containing air and oxygen, will rust be present ?
Yes
In a test tube with boiled water (to remove air) and oil (to prevent new air dissolving), will rust be present?
No
In a test tube with anhydrous calcium chloride (to remove water vapour from air) , will there be rust?
No
Explain how the barrier method of rust prevention works.
It stops air and water touching the surface of the iron.
List 4 ways the barrier method of Rust prevention is carried out.
Paint
Oil/Grease
Plastic coating
Plating with an un reactive metal
Give the word equation for rust.
Iron + oxygen -> Hydrated Iron (III) oxide
Give the word equation for combustion.
Methane + Oxygen —> CO2 + Water
Give the word equation for the reduction of iron oxide in a blast furnace.
Iron oxide + carbon monoxide —> Iron + CO2
Give the symbol equation for the reduction of iron oxide in a blast furnace.
Fe2O3 + 3CO —> 2Fe + 3CO2
What 3 substances are added in the blast furnace to extract iron?
Limestone, Iron Ore and Coke
Apart from molten iron, what other molten substance will be extracted in the extraction of iron in the blast furnace?
Molten Slag
