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level: Extracting Metals with Electrolysis

Questions and Answers List

level questions: Extracting Metals with Electrolysis

QuestionAnswer
What determines that Metal needs to be Extracted via Electrolysis?-If its more Reactive than Carbon [Reactivity Series] then it Has to use Electrolysis
Why does the Metal [That you want to be Extracted via Electrolysis] need to be Molten?-This is so the Ions can be Moved, so therefore when a Current is given in, the Metal can be Separated
Describe how Aluminium is Extracted from its Ore: Aluminium Oxide-The Ore is first Dissolved in a Molten Cryolite [Another Aluminium Compound] allowing the Ions to Move Around -Then, in Electrolysis, the Aluminium is formed at the Cathode where it then Sinks, and is Siphoned off. Oxygen is made at the Anode
What can be done to Impure Copper? Why is it Bad in the First Place?-Impure Copper isn't very Useful due to it being a Poor Conductor of Electricity, and Copper is very Common in Wirings -Electrolysis can be Done to Purify the Copper
Describe how Copper is Purified-Have the Positive Electrode [Anode] be just a Lump of Impure of Copper, which will therefore Dissolve -Have the Electrolyte [Solution] be Copper Sulphate -Have the Anode just be a Pure Piece of Copper, and you will see more Pure Copper being Added on to it
Why are Scientists looking into finding New Ways of Extracting Low-Grade Metals? [Ores that have very little amounts of the Metal]-This could be due to the Growing Demand of Metals, which can lead to Shortages, so being able to get the Most Amount from the Ore can be very Helpful
Explain how Bioleaching Works-This is simply using Bacteria to get the Metals Separated from their Ores -Bacteria gets the Energy from the Bonds between the Atoms, making the Separation clear. -The Leachate [Solution made from the Bacteria] will have Metal Ions, so using Displacement that has a more Reactive Metal, or Electrolysis can give you the Metal
Explain how Phytoextraction Works-This is simply making Plants grow in Solis that have Metal Compounds -The Plants are going to get Rid of the Metals, so they just Store it in their Leaves -Plants can be Harvested, Dried or Burned in a Furnace making Ash. This Ash will Contain the Metal Compounds therefore allowing it to be Extracted via Displacement or Electrolysis
What are the Disadvantages to Bioleaching and Phytoextraction?-It simply needs a Long Period of Time