Why does electroplating last?

Question

Physics

I wonder why the already reduced metal molecules stick to the electrode? Here from this text "Here there will also be an oncoming movement of ions to the electrodes. The positive ion will be the copper ion (Cu), and the negative ion will be the acid residue ion (SO4). Copper ions, when in contact with the cathode, will be discharged (attaching the missing electrons to themselves), t i.e. turn into neutral molecules of pure copper, and deposit on the cathode in the form of the thinnest (molecular) layer. I have a question - why do these already NEUTRAL molecules continue to remain on the electrode? what force is holding them there? Why don't they free-swim back into the solution or settle to the bottom?
article here

Answer 1

At school, even if you didn’t miss it, they studied not answers to specific subject questions like “why molecules don’t come off” or “why the sky is blue”, but physical mechanisms, understanding of which, in principle, gives answers to many such questions. Quite precisely, in the school course of physics there is " Fundamentals of Molecular Kinetic Theory ". And within the framework of this topic, they should probably have drawn this picture:
Which explains how molecules "hold on to each other."
So, in general, it is enough to know this and have an idea from the course of chemistry about the reduction of metal atoms under the action of an electric current during electrolysis.

Answer 2

I think it's diffusion