[Elmorshedy]

Why are electrodes in Daniell cell dipped in a solution of of its own ions for an example zinc is always dipped in ZnSO4??

[Hunter2]

Answe yourself: What would happen if you dip the zinc electrode in CuSO₄ solution?

[Elmorshedy]

Answe yourself: What would happen if you dip the zinc electrode in CuSO₄ solution?

Yeah to prefect the formation of ZnSO4 instead of CuSO4 that way no electrons would be deposit on the electrode  but when Zn electrode is dipped in ZnSO4 what gives Zn potential to lose electrons and form ions

[Hunter2]

Thats not the total answer. If the zinkelectrode dipped in coppersulfate. Copper will deposit on it and the reaction will stop soon.  To build a batterie or here the Daniel Element the electrodes are dipped in the solution of its own ions.
If the metalls dipped in the solution first nothing happend. If two half cells combined with a salt bridge then a potential is built up and dissolving can start if both electodes connected with a wire and a resistor.

[Elmorshedy]

I'm really sorry for my narrow knowledge in electrochemistry, when an Zn electrode is dipped in its own solution nothing happens, but why when both electrodes are dipped in their own solutions and a salt bridge is connected between them ionizations starts at the electrodes ?

[Arkcon]

No, still nothing happens.  Or more appropriately, very little happens.  However, when they are setup as you describe -- electrodes, solutions of their own salts, salt bridge (or semiporous membrane, or even just layered over each other) and then the electrodes are connected by a conductor, then the reactions proceed.  Here's a question for you -- why is this so?  What's happening, and how can you explain the similarity between a functioning electrochemical cell, and the reaction between dissimilar metals?   

[Elmorshedy]

No, still nothing happens.  Or more appropriately, very little happens.  However, when they are setup as you describe -- electrodes, solutions of their own salts, salt bridge (or semiporous membrane, or even just layered over each other) and then the electrodes are connected by a conductor, then the reactions proceed.  Here's a question for you -- why is this so?  What's happening, and how can you explain the similarity between a functioning electrochemical cell, and the reaction between dissimilar metals?

I just want to know the chemical explanation of why the atoms of the electrode ionize when it's is dipped in it's solution>
 

[student123]

I think some ions (Cu or Zn) are stronger, have more electrons. There is a electricity beetwen two different ions. Atoms in electrodes don't ionize but electrons go from one side to another from one solution to another solution . They go from solution with a lot of electrons to solution with few electrons. When they travel they also give energy for example photons if they go through lamp. At the end have both solutions the same number of electrons and "battery” is neutral.

[Borek]

I think some ions (Cu or Zn) are stronger, have more electrons.

No such things as "stronger" ion.

There is a electricity beetwen two different ions.

There is no such thing as electricity between ios.

Atoms in electrodes don't ionize

Yes, they do, converting atoms to ions is one of the reasons Daniell cell works.

They go from solution with a lot of electrons to solution with few electrons

Huh? How do you count electrons in the solution?

Please stop posting nonsense. It doesn't help others, it will just confuse them.

[student123]

I read somewhere that in two different solutions there are different voltages, and that is why there is electric circle. Isn't like this that there must be two different voltages?

[Borek]

Sure, different potentials of the redox systems present in different solutions is teh driving force behind the electrochemical cells. It doesn't make things you wrote correct.