using resources Flashcards
1
Q
how is soda-lime glass made and what is it most useful for?
A
- mixing sand, sodium carbonate and limestone
- heating in a furnace until it melts
- most useful for bottles and windows, but has a low melting point limiting its uses
2
Q
how is borosilicate glass made and what is it most useful for?
A
- mixing sand and boron-trioxide
- melting in a furnace
- higher melting point making it useful for objects that require heating e.g. lab equipment and kitchenware
3
Q
what is a reinforcement (in a ceramic)?
A
fibres or fragments of a material
4
Q
what is a matrix/binder?
A
the material that surrounds the reinforcement in a composite
5
Q
give an example of a composite
A
reinforced concrete, carbon fibre
6
Q
what is produced in the reaction:
phosphate rock + nitric acid
A
phosphoric acid and calcium nitrate
7
Q
what is produced in the reaction:
phosphate rock + sulphuric acid
A
single super phosphate
calcium phosphate + calcium sulfate
8
Q
what is produced in the reaction:
phosphate rock + phosphoric acid
A
triple superphosphate
