Metals Flashcards
1
Q
Wrought iron
A
Pure iron
Malleable
Ornamental railings
2
Q
Cast iron
A
Iron, carbon, silicon
Brittle, hard
Manhole covers
3
Q
Mild steel
A
Carbon 0.25%
Hard strong, malleable ductile
Wires, car bodies
4
Q
High carbon steel
A
Carbon 1.5%
Brittle, hard
Cutting tools
5
Q
Stainless steel
A
Iron, chromium, steel
Corrosion resistant
Cutlery
6
Q
Metal ores
A
Metal compounds
More reactive, harder to extract
Reduction reaction, reducing agent
Electrolysis or heating with carbon monoxide
7
Q
Extracting iron
A
C+O2=>CO2 CO2+C=2CO 3CO+Fe2O3=>2Fe+3CO2 CaCO3=>CaO+CO2 CaO+SiO2=>CaSiO3
8
Q
Aluminium extraction
A
Al3++3e-=>Al
2O2-=>O2+4e-
9
Q
Cryolite
A
Lowers melting point of aluminium oxide
Cheaper, environmentally friendly
10
Q
Carbon anode
A
Regularly replaced
Oxygen gas reacts with carbon anodes
Wears them away
