Answer:
Insert numbers next to these steps to show the correct order of events for a fuel cell to work. (1 - first step, 5 – last step).
2
At the anode, the H2 loses electrons and becomes H+.
5
At the cathode, H+ ions combine with electrons and O2 to produce H2O.
4
Electrons (e–) flow through the wire to produce electricity.
1
Fuel (H2) is pumped into the cell.
3
H+ flows through the electrolyte to the cathode.