metals and non metals Flashcards
1
Q
amphoteric oxide
A
aluminium oxide (Al2O3) and zinc oxide (ZnO)
(basic) Al2O3 + 6HCl —> 2AlCl3 + 3H2O
(acidic) Al2O3 + NaOH —> NaAlO2 + H2O
2
Q
metal + oxygen —> ???
A
metal oxide (basic oxide)
4Na + O2 —> 2Na2O
4Al + 3O2 —> 2Al2O3
3
Q
metal + water —> ???
A
metal oxide or metal hydroxide
2Na + 2H2O —> 2NaOH + H2
Ca + H2O —> Ca(OH)2 + H2
2Al + 3H2O —> Al2O3 + H2
4
Q
metal + acid —> ???
A
salt + H2
mg + 2hcl —> mgcl2 + h2
2al + 6hcl —> 2alcl3 + 3h2
zn + 2hcl —> zncl2 + h2
fe + 2hcl —> fecl2 + h2
5
Q
roasting
A
2ZnS + 3O2 —> 2ZnO + 2SO2
6
Q
calcination
A
ZnCO3 —> ZnO + CO2
7
Q
reduction of metal oxide into metal
A
2ZnO + C —> 2Zn + CO2
8
Q
stainless steel
A
Cr
Fe
Ni
9
Q
brass
A
Cu
Zn
10
Q
bronze
A
Cu
Sn (tin)
11
Q
solder
A
Pb
Sn (tin)
12
Q
duralumin
A
Al
Cu
Mg
Mn
