C10 Flashcards
Haber Process
Nitrogen and Ammonia extracted
Passed over by iron catalyst at 200 atm and 450 C
Condensed to form a liquid to remove ammonia
Unreacted hydrogen and nitrogen are recycled
What are 2 alternative methods to extracting copper?
Phytomining
Bioleaching
What is phytomining and a disadvantage?
When crops on contaminated land are harvested and burned prodicing ash that contains copper rich compounds
Process takes a lot longer
What is bioleaching and a disadvantage?
When bacteria is added to low-grade ores which break down the ored to create a copper rich solution called leachate solution
Slow process
What are 3 forms of protection from corrosion?
Coating
Sacrificial method
Galvanising
What are Alloys?
Alloys are a combination of metals
Types of Alloy
Gold
Bronze
Brass
Aluminium
Steel
What is corrosion
When a refined material is naturally deteriorated by oxygen
What are ceramics?
An inorganic non metal compound
Examples of ceramics?
Pottery
Glass
Cement
What are composites?
A material consisting of two or more materials with different properties
Examples of Composites?
Fibreglass
Reinforced concrete
Carbon fibre reinforced polymer
What are polymers?
A large class of material consists of many small molecules named monomers
What are polymers used for?
To make
Synthetic fibres
Plastic bag
Finreglass
Composites are usually made up of
A matrix
A reinforcement
