Copper can best be purified by

Chemistry WAEC 1989

Copper can best be purified by

  • roasting the impure copper in a blast furnace
  • heating the oxide with coke
  • electrolyzing a copper (ll) salt solution using the impure copper as the anode checkmark
  • converting the impure copper to a trioxonitrate (V)
  • washing the impure copper with sodium hydroxide solution

The correct answer is: C

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