Question

Write the Nernst Equation of of the following cell and find the electromotive force of the cell at 25°C temperature —

Mg(s)।Mg+2(0.001M)॥Cu+2(0.01M)।Cu(s)

Given —

E°Mg+2/Mg = –2.36 volt, E°Cu+2/Cu = 0.34 volt​

Answer 1

Explanation:

Mg(s) +Cu2+(aq)↔ Mg2+(aq) + Cu(s)

Nernst equation

There are two electron are transferring so that n = 2

E°cell = E° right – E°left

E°cell =+0.34 – (–2.37)V

E°cell =+2.71V

Plug the value we get

Concentration of solid substance is 1 always so that [Mg] = [Cu] =1