Topic 5 - Separate Chemistry 1
No description yet. This curated deck is ready for daily study.
Card preview (24)
Transition metals are the metals in
The middle of the periodic table, most of the metals
Transition metals properties
Hard, strong, shiny and malleable Good heat and electricity conductors High melting point High density They form coloured compounds Good catalysts(such as iron for the haber process)
The oxidation of metals results in
Corrosion
Rusting of iron is a
Redox reaction
Metals corrode in the presence of
Oxygen and water to form their metal oxides
Rusting is
the corrosion of iron
Ways to prevent rusting
Exclusion of oxygen Exclusion of water Sacrificial protection
Sacrificial protection is when
Another mroe reactive metal is put with the iron, so that this reacts with the oxygen and water rather than the iron
Electroplating is
Using electrolysis to coat teh surface of a metal with another metal
Electroplating is used to
Improve the appearance of a metal Protect against corrosion
Alloys are
Metals combined with another metal or non-metal
Pure metals are malleabel because
they have a regular arrangement of atoms so the layers can slide over eachother
Alloys are stronger than pure metals because
The atoms are different sizes, so the arrangement becomes random. This means the layers cant slide
Iron is alloyed with carbon
steels`
Steels are
Stronger and less corrosive than iron
Gold alloys are used for
Jewllery because it is stronger than pure gold
Aluminium alloys are used for
Making aircraft because it is light and strong
Copper+tin=
Bronze which is harder than copper
Copper+zinc=
Brass which is more malleabel than bronze
Magnalium=
Aluminium+Magnesium
Magnalium with low magnesium is
Strong, light and resistant to corrosion
Magnalium with high magnsium content is
More stable than pure magnesium but still reactive enough to make fireworks
Concentration is measured in
mol dm-3 or g dm-3
Concentration(mol dm-3) =
Number of moles / Volume of solution(dm3)