Electrochemistry: reference electrode

[AdityaDev]

Reduction half reaction : Cu²⁺+2e^- -> Cu(s)
I have a doubt in using the reference electrode.
For example if I have the calomel electrode (E_SCE=0.24V) how do I use it with the copper half cell? Are these reactions correct?
Cu²⁺+2e^- -> Cu(s)
2Hg+2Cl -> Hg₂Cl₂+2e-
To get E_cell=0.24+E_Cu|Cu²⁺

 

[Borek]

Draw a potential line - just like a horizontal axis of the plot.

Mark potentials of both half cells.

Cell potential is the distance between them.

 

[AdityaDev]

Draw a potential line - just like a horizontal axis of the plot.

Mark potentials of both half cells.

Cell potential is the distance between them.

My question is different. It's about the cell reaction. Not finding the potential from graph.

 

[Borek]

You have already listed both half cell reactions. If you need a full one, just combine them.

 

[AdityaDev]

You have already listed both half cell reactions. If you need a full one, just combine them.

My question : Are those reactions correct?
I'll edit the post.

 

[Borek]

No such thing as Cl in the second reaction, but I guess it is just a typo.

 

[AdityaDev]

No such thing as Cl in the second reaction, but I guess it is just a typo.

Sorry its cl-