Reactants As Electrodes

Ray Guo 4C
Posts: 90
Joined: Fri Sep 28, 2018 12:15 am

Reactants As Electrodes

In some half-cells the solid reactant can be used as the electrode, such as zinc in Zn/$Zn^{+2}$. How do I know which solid reactants can be used as electrodes and which ones cannot?

Matthew Mar 1J
Posts: 61
Joined: Fri Sep 28, 2018 12:15 am
Been upvoted: 1 time

Re: Reactants As Electrodes

Generally the reactants that can be used as electrodes will be metals in their solid form because they are conductive and can be involved in the reaction without being dissolved into the solution (there are exceptions like mercury which is a liquid metal and graphite which is made of carbon).