ELECTROLYSIS.......
while doing electrolysis of copper(2)sulphate using copper electrodes....y does copper frm anode deposit over cathode in an uniform way...???? it may so happen that the copper ions overlap over each other.....or gat concentrated at a particular place...????
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4 Answers
11THE DEPOSITION IS IN A UNIFORM WAY BECAUSE COPPER IONS WILL PREFER TO STICK TO CATHODE SURFACE THAN AT THE COPPER IONS THEMSELVES DUE TO HIGHER REDUCTION POTENTIAL AT CATHODE SURFACE
106Copper at the anode gets dissolved in the solutions as Cu2+. Now Cu2+ is much more stable as Cu, at the cathode it will discharge as: Cu2+ + 2e → Cu
Now, for this electron must be provided. These electrons are provided from the surface of the cathode. So, it is the surface that provides the bulk of electrons of deposition. Thus the surface gets exhausted first. Thus forming uniform deposition.
Here we assume that there is a steady and low current density and the process is not very fast.
11sry...but can u explain it once again..in little simpler way...it's not still clear 2 me...a little confusing...means what's the relation between higher reduction and uniform deposition over cathode???