posted by .

During the electrolysis of an aqueous solution of CuSO4 with inert electrodes
(A) the anode loses mass and the cathode gains mass.
(B) the mass of the anode remains the same but the cathode gains mass.
(C) the mass of the anode decreases but the mass of the cathode remains constant.
(D) the anode and the cathode neither gain nor lose mass.
(E) both electrodes gain in mass.

I was thinking in Electrolysis of CuSO4(aq)
Anode: 2H2O O2(g) + 4H+1 + 4e-1 -1.23V
Cathode: 2 Cu+2+ 4e-1 2Cu + 0.34V
Overall: 2H2O + 2 Cu+2 O2(g) + 4H+1 + 2Cu E° = -1.02V

that it would be D because it doesnt really change in either

  • Chemistry -

    In the electrolysis of CuSO4, isn't Cu plated out on the - electrode?

  • Chemistry -

    what do you mean by plated

  • Chemistry -

    Electrolysis is used for plating one metal onto itself or onto another. For example, one can buy silverware to eat and cook with (most people use stainless steel) that is essentially pure silver ( and pay a high price for it--real silver ware has the notation sterling silver on it) OR one can purchase the less expensive silver plate in which a thin layer of silver or gold is plated onto a base metal of some kind. Obviously that is much much cheaper. Baby shoes are "bronzed" that way (by electroplating). So by plating Cu, I mean Cu^+2(aq) + 2e ==> Cu(s) and the copper is plated onto the host electrode. In fact, copper metal is refined that way, from impure copper to relatively pure copper by electroplating it onto a very thin piece of copper foil. The impure copper goes into solution at one electrode and plates out at the other electrode. And the silver and gold impurities are left as a sludge in the vessel and is refined. Often the silver and gold recovered more than pays for the electrolysis of the copper.

  • Chemistry -

    B,because in this type of reaction the anode does not ionises and remains the same but due to mthe ionisation of the CuSo4 soln. the cathode gains mass and increases in sizi.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Chemistry

    If a copper sample containing some zinc impurity is to be purified by electrolysis, the anode and the cathode must be which of the following?
  2. chemistry

    During the electrolysis of molten aluminum chloride in an electrolytic cell, 5.40 g of aluminum is produced at the cathode. Predict the mass of chlorine produced at the anode.
  3. chemistry- DrBob

    Last week i did a lab and i just wanted to show you my results because my computer was acting weird when i used the voltage probe.(I just needed you to check that the cathode and anodes and voltages make sense) CuSO4(cathode)and Al2(SO4)3 …
  4. chemistry- DrBob

    summarize part a ( the data i showed you) in a data table containing heading: anode, cathode, overall cell reaction, and cell potential . for each cell combination, write the anode half reaction, the cathode half reaction, the overall …
  5. Chemistry

    Design an electrochemical cell using Pb(s) and Mn(s) and their solutions to answer the following questions. I just want to see if my answers are correct. I drew the cell already. Thanks 1. Give the line notation for this electrochemical …
  6. Chemistry ,Reactions at Electrodes during Electrol

    Reactions at Electrodes during Electrolysis Which half-reaction will take place at the cathode during the electrolysis of molten MgCl2?
  7. ap

    A battery has two electrodes labeled anode and cathode. Electrons flow from the (anode, cathode) to the (anode, cathode) through the external circuit and (an oxidation, a reduc- tion) reaction occurs at the cathode. 1. anode; cathode; …
  8. Chemistry

    1. Which of the following metals is oxidized by calcium ions?
  9. Chemistry: please check

    At which electrode does oxidation occur in a voltaic cell?
  10. chemistry

    Electrolysis is carried out for 2.00 h in the following cell. The platinum cathode which has a mass of 25.0782 g, weighs 25.8639g after the electrolysis. The platinum anode weighs the same before and after the electrolysis. there is …

More Similar Questions