# Does Le Chatelier's principle apply to electrochemical cells?

##### 1 Answer

Le Chatelier's Principle is very important when applied to electrochemical cells.

Consider the Daniel Cell:

The 2 half cells are:

To find **least positive** value from **the most positive** value:

And the cell reaction is therefore:

These refer to standard conditions i.e unit concentrations, 298K and pH zero.

What would happen if we were to reduce the concentration of

Looking at the Cu2+/Cu half - cell Le Chatelier's Principle would predict that would cause the position of equilibrium to shift to the left to produce more Cu2+.

This would cause the

We can calculate the new value using the Nernst Equation which in this case is:

So as predicted by Le Chatelier,. the value of