Lecture 3 Electrode Potentials Flashcards
what is the driving force for electrochemical reactions
cell potential
equation for potential difference of a full cell
Ecell = Ecathode - Eanode
what is electromotive force
maximum potential generated by a cell
what is standard cell potential
maximum potential generated by a cell
what total activities of reactants and products means a cell is working at maximum potential
1
what do you use to measure potential
voltmeter
how can you measure the absolute values of half-cell potentials
you can’t
how to find the potential of a half-cell
defne a standard potential
what is potential of standard hydrogen electrode
0.0V
standard conditions of SHE
1 bar
1 moldm^-3 of H+ concentration
what generally has positive half-cell potential
good oxidising agnets
what are reactions that define electrode potentials written as
reduction
E circle with horizontal line through in superscript
oxidised form/reduced form in subscript
where do good oxidising agents lie on the table
above SHE
where do good reducing agents lie on the SHE
below SHE
what generally has negative half cell potential
good reducing agents