Chemsitry - Metals Flashcards
Typical properties of metals
High melting points
High boiling points
Solid at room temperature
High density
Good electrical conductor
Good heat conductor
Malleable
ductile
shiny
What is a catalust?
A substance used to change chemical reactions (rate of reaction) without being used up
What is the name of the transition metal used in the manufacture of ammonia?
Iron
What transition metal is used in catalytic converters in vehicle exhausts?
Platinum
What colour is a compound containing Fe (2+)
Pale green
What colour is a compound containing Fe(3+)
Yellow
What colour is a compound containing Cu(2+)
Blue
What is an alloy?
Chemically combined (2 or more) metals that are mixed when molten(melted)
Why are alloys useful?
Because their properties are stronger than a single metal by itself
Why is the alloy, Steel, more useful than Iron?
Lighter
Stronger
Harder
How is iron turned into steel
By adding carbon to remove the oxygen
What metal is used for bridges and cars and why
Steel because it is strong and doesnt rust
What metal is used for drills, cutlery and spades and why
Steel because its hard
What metal is used for overhead power cables and why
Aluminium because it
Conducts electricity well
Low density
Doesnt rust
What metal is used for aeroplanes and why
Aluminium because its low density
What metal is used for window frames and why
Aluminium because its
Low density
Strong
Doesnt rust
What metal is used for saucepans and why
Copper because
Good conductor of heat
High melting point
What metal is used for electrical wires and why
Copper because
Good electricity conductor
Ductile
What metal is used for water pipes and why
Coppr because
Doesnt rust
High melting point
What metal is used for high speed aircrafts and why
Titanium because
Strong
Doesnt rust
Put these metals in order of reactivity from highest to lowest
Ag, Fe, Cu, Zn
Zn
Fe
Cu
Ag
When does a displacement reaction happen
When one metal is more reactive than another so it replaces it
Explain metal extraction
Metals are found in the earths crust
The most unreactive metals, such as Gold, can be dug up straight from the ground. This is because they do not react with substances around them to make compounds
More reactive mets form compounds with other substances and as a result we have to extract these metals using chemical reactions.
The more reactive the metal the harder it is to extract, many are extracted using competition reactions.
What is put into the top of a blast furnace when extracting iron?
Haemetite (iron ore)
Coke
Limestone
