Consider the following electrochemical cell notation: M(s) / M2+ (aq)// H+ (aq)/ H2(g). The value of the electrode potential is positive when?
- electrons flow from the metal electrode, M(s) to hydrogen electrode, H2(g)
-
electrons fow from hydrogen electrode, H2(g) to metal electrode, M(s)
- the flow of current is high
- there is equilibrium between the flow of electrons from the hydrogen electrode, H2(g) to metal electrode, M(s)