electrochemistry

  1. I

    Why is the current draw dropping in water electrolysis

    We've done an experiment regarding water electrolysis. Basically, we just separated the oxygen and hydrogen gas in a beaker that contains a magnesium sulfate solution. We set the power supply voltage to 12.46V with an initial .09A and final .01A over 45 mins. I was wondering as to what causes...
  2. E

    Which reference electrode to select for electrochemical measurements? The one with Vy

    Hi. Is there any significant difference in quality and accuracy between reference electrode with Vycor frit (porous glass attached with heat-shrink tube) and the one equipped with ceramic frit (molten in the glass tube) like in this example...
  3. M

    Voltaic Cell Lab

    Hello I need help. I have done a lab on how temperature affect the cell potential of a voltaic cell. I have changed the temperature and graphed cell potential against temperature. I am not sure what the slope shows. Can anyone help me please. I looked at it by doing the Nernst equation which...
  4. P

    Please Help With An Electrochemical Calculation.

    Hi, Please help me with this, I greatly appreciate any assitance; An electrochemical cell is given, one containing an 0.1M CuSO4 solution and the other one containing an 0.1M ZnSO4 solution. Then, the Cu ion concentration is decreased by adding an Ammonia solution NH4OH into the CuSO4...
  5. I

    Need a practical advice in electrochemistry area

    Hello, all, I am not a specialist in Chemistry, need your help or advice: If a DC electrical potential is connected to 2 electrodes made of same metal sunk in salt water, electrolysis will happen and the molecules from one electrode will loose electrodes would migrate to the other and maybe...
  6. A

    Electrochemistry. Electrolysis CuSO4 copper electrodes

    Hi everyone, I'm doing an experiment on electrolysis of CuSO4 using copper electrodes and there is something that confuses me a lot The thing is that the concentration of the electrolyte should remain the same and so does the copper ions. However, when measuring the current, it increases...
  7. V

    Help with Concentration Cells?

    Hello! Could someone please fill me in on concentration cells? Is the higher concentration the anode or the cathode? Here's why I'm confused: According to my book, these statements are false, The half-cell with the higher concentration of copper (II) ions must be the anode. The cell that has...
  8. B

    Electrochemistry Question

    Hello everyone, I've been reading up on electrochemistry and trying to make the connection from chemistry theory to what I learned during my time as an undergrad and grad student in electrical engineering and I'm having trouble bridging the gap. I have selected one example from my reference text...