GCSE Chemistry

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ghoran
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146001
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GCSE Chemistry
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2012-04-09 06:33:29
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  1. extracting iron from its ore is a huge industry . Iron is the .... most common metal in th earths crust . Iron ore contains iron combined with ..... . Iron is .... reactive than .... so we can extract iron by using .... to remove .... from the iron ... in the ore
    • 2nd
    • oxygen
    • less
    • carbon
    • carbon
    • oxygen
    • iron oxide
  2. we extract iron using a 1) .... ... . this is a large container made of steel . It is lined with fireproof bricks to withstand the high temperatures inside . there are solid raw materials which we use in the 2) .... .... , as well as lots of air . they are : 3)...... (this is the most comon iron ore , it contains mainly 4)..... ... ) and 5) .....) and 6) ...... ( this is made from 7).... and is almost pure 8)..... . It will provide the reducing agent to remove the 9)....... from 10) .... .... .) we also add limestone to remove impurities
    • 1) blast furnace
    • 2) blast furnace
    • 3) heamatite
    • 4) iron oxide
    • 5) sand
    • 6) coke
    • 7) sand
    • 8) carbon
    • 9) oxygen
    • 10) iron oxide
  3. describe the stages involved in extracting iron using a blast furnace
    • Hot air is blown into the blast frunace . this makes the coke burn , which heats the furnace and forms carbon dioxide gas
    • at the hot temperatures in the blast furnace , this carbon dioxide reacts with more coke to form carbon monoxide gas
    • the carbon monoxide reacts with the iron oxide removing its oxygen , and reducing it to molten iron , this flows to the bottom of the blast furnace
  4. the first stage of extracting iron using a blast furnace is as follows , write a balanced symbol equation for this reaction
    Hot air is blown into the blast frunace . this makes the coke burn , which heats the furnace and forms carbon dioxide gas
    C + O2 ====> CO2
  5. the second stage of extracting iron using a blast furnace is as follows , write a balanced symbol equation for this reaction
    at the hot temperatures in the blast furnace , this carbon dioxide reacts with more coke to form carbon monoxide gas
    CO2 + C ==> 2CO
  6. the first stage of extracting iron using a blast furnace is as follows , write a balanced symbol equation for this reaction
    the carbon monoxide reacts with the iron oxide removing its oxygen , and reducing it to molten iron , this flows to the bottom of the blast furnace
    3CO + Fe2O3 ====> 2Fe + 3CO2
  7. Why do we need oxygen
    to make the coke burn to produce carbon dioxide
  8. why is the air that's blown in hot
    to ensure temperatures in the blast furnace remain high
  9. the iron produced by a balst furnace , called ...... iron , is not very useful it , contains about ......% iron . the main impurity in this iron is ....... from the manufacturing process . this makes the metal ..... , so it only has ...... ..... . It is mainly used as ....... .... because it is cheap and strong in ..... . it was used for old fashioned .... and ...... ....
    • pig
    • 96
    • carbon
    • brittle
    • limited uses
    • engine blocks
    • compression
    • cannons
    • cannon balls
  10. removing all the impurities from pig iron would produce ...... ... . this is too ...... (..... ....) and too .... for most uses . Most of the hot molten iron from a blast furnace goes straight to a ....-.... .... . here it is converted into .... with the ideal .... and .... . steels are .... - mixtures of iron with carbon and often other metals
    • pure iron
    • malleable
    • easily shaped
    • soft
    • steel-making furnace
    • steels
    • strength
    • hardness
    • alloys
  11. alloys are
    mixtures of metals , or metals mixed with small amounts of other materials . alloys have the typical properties of metals - for example they conduct electricity . But alloys can can also have properties very different to the metals they are made of
  12. why is pure iron soft and and easily shaped
    the atoms in pure iron are are arranged in in layers . because of this regular arrangement , the atoms can slide over each other very easily . This is why pure iron is very soft and easily shaped
  13. alloys have properties for specific uses . some are designed for hardness , some for resistance to corrosion and others have special magnetic or electrical properties . alloys are usually made by :
    metling the main metal and dissolving the other elements in it
  14. complete the following table
  15. different elements have ...... .... ... . so when an element such as carbon is added to pure iron , the smaller carbon atom will ..... the .... of ..... ..... ... , making it more .... for them to ..... .... .... ... . so alloys are ....
    • different sized atoms
    • distort
    • layers
    • pure iron atoms
    • difficult
    • slide over each other
    • harder
  16. bronze = ...... and ....
    bronze is harder than .....
    it's good for making ..... and .... from
    • copper and tin
    • copper
    • medals and statues
  17. cupronickel = ..... and .....
    this is ... and ..... resistant
    it's used to make "...." ....
    • copper and nickel
    • hard and corrosion resistant
    • "silver" coins
  18. ..... ..... are used to make jewellery . pure ... is too ... . metals such as zinc , copper , silver , palladium and nickel are used to ..... the "...."
    • gold alloys
    • gold
    • soft
    • harden
    • gold
  19. aluminium ... are used to make ...... . aluminium has a .... ... , but it's ...... with small amounts of other metals to make it ......
    • alloys
    • aircraft
    • low density
    • alloyed
    • stronger
  20. metals are all the same but slighty different . they have the same basic properties in common , nut each has its own specific combination of properties , which mean you use different ones for different properties . metals are ..... and ..... and they're great ......
    • strong
    • bendy
    • conductors
  21. most of the elements are ..... - so they cover most of the periodic table , in fact only the elements on the far right are .....-.... .
    • metals
    • non-metals
  22. all metals have fairly similar basic properties : (7)
    • strong and hard
    • good conductors of heat
    • high melting points and boiling points
    • malleable
    • solid at room temperature
    • ductile
    • good conductor of electricity
    • sonorus
  23. metals (and especially transition metals , which are found in the .... .... of the periodic table) ahev loads of everyday uses because of these properties
    their strength and bendability makes them handy for making into things like .... and ..... ...
    metals are ideal if you want to make something that .... needs to travel through , like a suacepan base
    and thier conductivity makes them great for making things like ...... ...
    • centre block
    • bridges
    • car bodies
    • heat
    • electrical wires

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