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Y11 chemistry CC10/11 Electrolysis Equilibrium

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    Electrolysis and Equlibrium
  •   Study   Slideshow
  • Which is the negative electrode? Which ions migrate to it?
    Cathode, Cation
  •  10
  • State the charge of the electrode where oxidation takes place.
    Positive
  •  10
  • What is meant by the degree of dissociation?
    It is the extent to which an electrolyte breaks up into ions
  •  15
  • Explain how OH- ion yields oxygen gas at the anode.
    4 OH- ons lose an electron each and give 2 molecules of water and one molecule of oxygen
  •  15
  • State the entire electro-chemical series of metals in proper order.
    K, Ca, Na, Mg, Al, Zn, Fe, Pb, [H], Cu, Hg, Ag
  •  20
  • Metals which ionize most readily are at the ________ of the series. [top / bottom]
    top
  •  5
  • Why is pure water a non-electrolyte?
    Because contains only molecules and not ions to conduct electricity
  •  10
  • Mention any two conditions for electroplating [with reasons]
    To be discussed
  •  20
  • Why are articles electroplated? [two reasons]
    To prevent corrosion and to make them attractive
  •  10
  • What is electroplating?
    Electroplating is the electrolytic process of deposition of a superior metal on the surface of a baser metal or article.
  •  10
  • Name the electrode that diminishes during electroplating.
    Anode
  •  5
  • Define electrode
    a negatively charged particle
    rod of metal/graphite which carries current in/out solution
    chemical decomposition produced by passing electric current
    a positively charged metal
  •  15
  • electrolysis can only occur in
    solutions or liquids
    gases
    any of the other choices
    solids
  •  15
  • Explain why ionic solids cannot be electrolysed
    ions cannot move around in a solid (when electrolysis occurs ions need to move to electrodes)
  •  20
  • What type of ion is Fe2+
    cation
  •  10
  • What type of ion is F-?
    anion
  •  10