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Flashcards

Chemistry 1.3

sophie.west2012. Chemistry C1 maths English 40 cards

Cards in this deck (40)

  1. 1What are ores?naturally occurring rocks that provide an economic starting point for the manufacture of metals
  2. 2What is iron ore used to make?iron and steel
  3. 3Why are new methods of extracting copper being developed?because copper rich ores are becoming scarce
  4. 4What is wrong with the production of the useful metals aluminium and titanium?it is expensive
  5. 5What do ores contain enough of to make it economical for extraction?metal
  6. 6If the price of a metal goes down, what may it not be economical to do?extract the metal from low-grade ored
  7. 7what may ores be after they are mined but before they are extracted and purified?concentrated
  8. 8How are unreactive metals such as gold found?In the Earth as the metal itself
  9. 9What are more reactive metals found as?minerals in ores
  10. 10What are minerals? So what is needed to extract the metal?Compounds
    a chemical reaction
  11. 11What is reduction?The removal of oxygen
  12. 12How are metals that are less reactive than carbon be extracted from their oxides?by reduction with carbon
  13. 13How can copper be extracted from copper rich ores? What is this process called?By heating the ores in a furnace
    smelting
  14. 14What may traditional mining and extraction of copper have? Therefore what is being researched to limit the environmental impacts of traditional mining?major environmental impacts
    new ways of extracting copper from low-grade ors
  15. 15Which 2 ways can copper be extracted?phytomining
    bioleaching
  16. 16What happens in phytomining?plants absorb metal compounds
    plants are then burned to produce ash that contain the metal compounds
  17. 17What is bioleaching?bacteria produce leachate solutions that contain metal compunds
  18. 18How can metals that are more reactive than carbon be extracted?by electrolysis of molten compounds
  19. 19What makes these metals expensive?The large amounts of energy used in their extraction
  20. 20How can copper from smelting be purified?by electrolysis
  21. 21which 2 ways can copper be obtained from solutions of copper salts? e.g. of number 2?electrolysis
    displacement using scrap iron
    copper sulphate + iron + copper + iron sulphate
  22. 22What happens during electrolysis?positive ions move towards the negative electrode
  23. 232 reasons why current methods of extracting aluminium and titanium are expensive?there are many stages in the process
    large amounts of energy are needed
  24. 243 reasons why metals should be recycled?It is cheaper in terms of energy as it takes less energy to recycle than dig out ores
    No mining= no spoil heaps and no s emission of harmful gases
    limited resources- so should conserve remaining ore
  25. 25HERE STARTS ALLOYS Metals can be mixed together to make what?!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    alloys
  26. 26What is cast iron?iron from the blast furnace that contains 96% iron
  27. 27What makes cast iron have limited uses but strong in compression?impurities that make it brittle
  28. 28What is most iron converted into? What are steels?steels
    alloys- mixtures of iron carbon and sometimes other metals
  29. 29How can alloys be designed to have properties for specific uses?by varying the amounts of other metals that are added
  30. 30low-carbon steels are... high-carbon steels are... stainless steels are...easily shaped
    hard
    resistant to corrosion
  31. 31Why are pure copper, gold, iron, and aluminium mixed with small amounts of similar metals?as they are too soft for many uses and doing this makes them harder
  32. 32What is used to make cutlery?Stainless steel
  33. 33What is used to make coins?Various alloys of copper and nickel
  34. 34What is used to make brass door handles?alloys of copper and zinc
  35. 35Why is copper added to pure gold rings?as they would be far too soft to keep shape to copper is added to increase their strength
  36. 36What is aluminium often alloyed with to make it strong enough for everyday use?magnesium
  37. 37What are the elements in the central block of the periodic table known as?transition metals
  38. 383 reasons why is copper useful for electrical wiring and plumbing?it is a good conductor of heat and electricity
    it can be bent but is hard enough to make pipes or tanks
    it doesn't react with water
  39. 39what 2 properties make aluminium and titanium useful?low density
    resistant to corrosion
  40. 40What is cast iron good for? What is it bad for? Why is this?manhole covers
    bridges
    because it is brittle but strong under compression

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maths Chemistry C1 Flashcards on Chemistry 1.3, created by sophie.west2012. on 08/03/2015.
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