Hydrogen Galvanic Cell

[gabbymaraziti]

The textbook states "Not all electrode reactions include a conducting solid as a reactant or product. For example, to use the reduction 2H+ + 2e- --> H2 at an electrode, a chemically inert metallic conductor, such as an unreactive metal or graphite, must carry the electrons into or out of the electrode compartment."

What is the significance of using a conducting solid for an electrode? Why can we not use a conducting solid for an electrode in association with hydrogen?

[Vincent Leong 2B]

the conducting solid of the electrode allows for a current to flow. The Voltage numbers that are given by appendix 2 are achieved by the redox reactions that occur in the galvanic cell; They are recorded when electrons are moved from the solution, attach to the cathode or anode, and flow through the metallic wire to the respective anode/cathode.