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Homework Help: Negative electrode and mass

  1. Sep 16, 2010 #1


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    1. The problem statement, all variables and given/known data
    If 3.00 10-3 kg of gold is deposited on the negative electrode of an electrolytic cell in a period of 2.62 h, what is the current in the cell during that period? Assume the gold ions carry one elementary unit of positive charge.

    2. Relevant equations
    delta Q/delta T
    n*q*vd*A: n = moles, q=charge, vd=drift speed and A= cross sectional area of conductor.

    3. The attempt at a solution

    I'm having a bit trouble starting this because I think we have to derive an equation since we only have mass and the time, and nothing else given. I tried to put the two equations posted together, but it did not look right nor make sense. Can someone give a hint on how to start this?
  2. jcsd
  3. Sep 17, 2010 #2


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    Staff: Mentor

    Google Faraday's law of electrolysis.

    But with some thinking you should be able to solve it on your own. There is one electron per atom - how many electrons per mole?
    Last edited by a moderator: Aug 13, 2013
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