Electrochemistry and cell electroplating

[dec123]

Hello, I have a question in regards to electroplating. If i have a cell with let's say a zinc cathode and an inert anode in a solution of copper ions, and I turn on the current, what reaction will counter the reduction of copper ions to balance the electronegativity and what will be the potential of the cell?

 

[Borek]

Hint: if there is nothing else to react and potential is high enough, there is always solvent present.

 

[dec123]

Hint: if there is nothing else to react and potential is high enough, there is always solvent present.

Ok, but the electrolysis of water is a reaction that balances itself, if there is already reduction of metal on the cathode, there can be only another oxidation which balances that reduction, is that not correct? If so, what is the exact reaction and what cathions are left in the water?

 

[jim mcnamara]

Is this a homework question?

 

[Borek]

Ok, but the electrolysis of water is a reaction that balances itself

No, it is a sum of two separate processes, one occurring on the anode, the other on the cathode. They don't have to happen both at the same time.