Is there a quick way to remove copper from electrodes after electrolysis?

Discussion in 'Supporting Chemistry' started by Julie Delaney, Mar 17, 2017.

  1. Julie Delaney

    Julie Delaney COMMITTEE

    Hi All, is the a secret techie's quick way to remove copper from carbon electrodes other than scraping it off? Will a dip in any acid or anything else make it magically disappear? Thanks guys. :cool:
     
  2. I soak them in 1m Nitric Acid over night and rinse off. Works a treat!

    Sarah
     
    Vee, IceG and Paul Murphy like this.
  3. Sandpaper. Cu removed in a split second.
     
    Jaytee likes this.
  4. Dilute sulphuric acid should do the trick Julie.:rolleyes::D
     
  5. Julie Delaney

    Julie Delaney COMMITTEE

    Thanks George, I love your graph, I just wish I could get my head around it.:D:p
     
    GeorgetheScienceTech likes this.
  6. Same here.
     
    Julie Delaney likes this.
  7. Ferric chloride is used industrially to remove copper from circuit boards. I keep a 1M solution that I re-use for removing copper from electrodes.
     
  8. Thanks Julie. It's all very simple really.:rolleyes: The First Derivative (red line) shows the change in pH with volume as the Ethanoic acid is added. The Blue line represents the Second Derivative, Where this plot intercepts with the X-axis yields the equivalence point.:p:p:rolleyes:
     
  9. Julie Delaney

    Julie Delaney COMMITTEE

    I though so!! LOL. Have a great weekend George. :p:D:rolleyes:
     
  10. Julie Delaney

    Julie Delaney COMMITTEE

    That sounds good, is it instant?
     
  11. Not instant, but minutes not hours.
     
  12. And what about the disposal of the salt solutions that have been already used?
     
  13. I think most can go down the sink but just check the hazcard to see if they are W7 or not.
     
  14. Just checked it, it just has to be less than 0,2M and then down the sink
     
  15. 007

    007 COMMITTEE

    We use a band saw gets it off really quickly ;)
     
    Carol Taylor likes this.
  16. Reverse the polarity. Whatever is on the electrodes just falls off
     
    Tony Worthy likes this.
  17. Conc nitric works nicely - we have a bottle especially for this job and reuse it until it stops working.
     
    Emil Retaw likes this.
  18. Yup this is exactly what I do too. I keep a stock of recycled concentrated nitric acid just for this purpose. Gets rid of copper instantly. Just make sure you do this in a fume cupboard as NO2 fumes are released.
     
  19. Well Julie and 007 @007 are you enjoying your role as a Prep Room Committee Members?:)
     
  20. Julie Delaney

    Julie Delaney COMMITTEE

    yes thank you George, I felt very honoured to be chosen.
     
    GeorgetheScienceTech likes this.