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why are carbon electrodes commonly used in electrolytic cells

    • egative electrode (cations attracted to cathode), e.g. in the diagram, sodium ions Na+ , move to the negative electrode (-ve),
    • and negatively charged ions move to the positive electrode (anions attracted to anode), e.g. in the diagram, chloride ions Cl-, move to the positive electrode (+ve).
  • The diagram shows the industrial electrolysis process (in a Down's Process Cell) to extract sodium metal from sodium chloride (common salt).
  • During electrolysis, gases may be given off, or metals dissolve or are deposited at the electrodes.
    • Metals and hydrogen are formed at the negative electrode from positive ions by electron gain (reduction), e.g. in molten sodium chloride
      • sodium ions change to silvery grey liquid sodium
        • Na+ + e- == Na (a reduction electrode reaction)
    • and non-metals e.g. oxygen, chlorine, bromine etc. are formed from negative ions changing on the positive electrode by electron loss (oxidation), e.g. in molten sodium chloride
      • chloride ions change to green chlorine gas
        • 2Cl- - 2e-== Cl2 or 2Cl-== Cl2 + 2e-(an oxidation electrode reaction)
    • The electrons released by the oxidation at the positive anode, flow round through the anode and wire to the positive cathode and so bring about the reduction i.e. of the sodium ion.
  • In a chemical reaction, if an oxidation occurs, a reduction must also occur too (and vice versa) so these reactions 'overall' are called redox changes.
    • You need to be able to complete and balance electrode equations or recognise them and derive an overall equation for the electrolysis.
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A carbon black called acetylene black, which is commonly used as an .... The electrochemical reaction at the negative electrode in lithium-ion cells is the.

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it is one of the good conductors of electricity. so, mostly we use them in electrolytic cells to demonstrate conductivity through liquids

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CARBON IS ONE OF THE EXCEPTION OF ELECTRICAL CONDUCTIVITY OF NON METALS ALONG WITH GRAPHITE AND THUS IT IS USED AS ELECTRODES IN AN ELECTROLYTIC CELL
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Carbon electrodes are commonly used in electrolytic cells because carbon is a non-metal and a good conductor of electricity. 

Hope it helped! :)
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This is because it is one of the good conductors of electricity.so we mostly use them in electrolytic cells to demonstrate conductivity through liquids HOPE IT HELPED:)
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it is a good conductor of electricity :)
 
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Electrodes are essential for the electrolysis.
Graphite which is the Allotropic form of carbon is used in the electrolysis for the following reasons:
1.Graphite is a good conductor of electricity.
2. Graphite has high  resistant to corrosion.
3. Graphite is cheaper
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Carbon electrodes are commonly used in electrolytic cells because carbon is a non-metal and a good conductor of electricity..







OR





It is one of the good conductors of electricity. so, mostly we use them in electrolytic cells to demonstrate conductivity through liquids


Hope it helped! :)


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