14130571
Beschreibung
Mindmap von Shravani Chingre, aktualisiert more than 1 year ago
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Erstellt von Shravani Chingre
vor etwa 6 Jahre
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The Behaviour of Metals and
Making use of Metals
- Place in order of reactivity:
- potassium, sodium, calcium,
magnesium, zinc, iron,
hydrogen, copper,silver and glod.
- potassium, sodium, calcium,
magnesium, zinc, iron,
hydrogen, copper,silver and glod.
- Compare the reactivity series to the
tendency of a metal to form its positive
ion, illustrated by its reaction
- Metals lose electrons. So
they form a positive ion.
- Metals lose electrons. So
they form a positive ion.
- Describe the use of carbon
in the extraction of some
metals from their ores
- Carbon is more reactive than Iron Lead and zinc so you
can use it to extract them from their ores. You but the
ore of iron (hematite) in a blast furnace for example
and then you add carbon. A reaction will take place
and since the carbon is more reactive than the iron it
will displace the iron. Now you have the element iron.
- Carbon is more reactive than Iron Lead and zinc so you
can use it to extract them from their ores. You but the
ore of iron (hematite) in a blast furnace for example
and then you add carbon. A reaction will take place
and since the carbon is more reactive than the iron it
will displace the iron. Now you have the element iron.
- Relate the method of
extraction of a metal
from its ore to its position
in the reactivity series
- Metals above carbon in the reactivity
series are extracted by electrolysis. Metals
below carbon are usually extracted by
heating their corresponding metal oxide
with carbon.
- Metals above carbon in the reactivity
series are extracted by electrolysis. Metals
below carbon are usually extracted by
heating their corresponding metal oxide
with carbon.
- Describe the essential
reactions in the extraction
of iron in the blast furnace
- Iron is extracted from iron ore in a huge container called a
blast furnace. Iron ores such as haematite contain iron
oxide. The oxygen must be removed from the iron oxide to
leave the iron behind. Reactions in which oxygen is
removed are called reduction reactions
- iron oxide + carbon → iron + carbon dioxide
2Fe2O3 + 3C → 4Fe + 3CO2. In this reaction, the
iron oxide is reduced to iron, and the carbon is
oxidised to carbon dioxide
- Iron is extracted from iron ore in a huge container called a
blast furnace. Iron ores such as haematite contain iron
oxide. The oxygen must be removed from the iron oxide to
leave the iron behind. Reactions in which oxygen is
removed are called reduction reactions
- Explain the use of aluminum in
aircraft manufacture in terms of the
properties of the metal and alloys
made from it
- Pure aluminum is too weak for making aircraft
parts but low-density alloys made from it are much
stronger. This means that they can withstand the
stresses in an aircraft. The low density means the
aircraft has a relatively low mass that saves fuel
costs and is generally beneficial for flight
- Pure aluminum is too weak for making aircraft
parts but low-density alloys made from it are much
stronger. This means that they can withstand the
stresses in an aircraft. The low density means the
aircraft has a relatively low mass that saves fuel
costs and is generally beneficial for flight
- Explain why metals are
often used in the form of
alloys
- Improvement in corrosion
resistance and mechanical
properties such as strength
- Improvement in corrosion
resistance and mechanical
properties such as strength
- Identify and interpret
diagrams that represent the
structure of an alloy
- That particle cannot slide over each
other as easily as in a single metal
because of the regular structure is
disrupted.
- That particle cannot slide over each
other as easily as in a single metal
because of the regular structure is
disrupted.
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