concentration cell

Moderators: Chem_Mod, Chem_Admin

Ruiting Jia 4D
Posts: 65
Joined: Fri Sep 28, 2018 12:27 am

concentration cell

Postby Ruiting Jia 4D » Sun Mar 03, 2019 7:33 pm

What do concentration cells mean? And why are they always 0?

Posts: 63
Joined: Fri Sep 28, 2018 12:23 am

Re: concentration cell

Postby Brandon_Tran_2E » Sun Mar 03, 2019 8:27 pm

Concentration cells are galvanic cells with same components (AgNO3 the example Lavelle gave us) but it only works when concentrations are different. The standard cell potential is always zero because the conditions of standard cell potential requires the concentrations to be at 1M, so the voltage is zero since there's no flow of electrons if its the same AgNO3 at 1M.

Jonathan Omens 1K
Posts: 60
Joined: Fri Sep 28, 2018 12:15 am

Re: concentration cell

Postby Jonathan Omens 1K » Sun Mar 03, 2019 8:27 pm

A concentration cell is a galvanic cell with both sides containing the same solutions at different molarities. The Eo is always zero because it is calculated using the standard reduction potentials of both sides which are the same because the solutions contain the same components.

Return to “Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)”

Who is online

Users browsing this forum: No registered users and 1 guest