Outline how hydrogen is manufactured from water
Do i just say electrolysis
Brine is electrolysed in a diaphragm cell.
The ions in solution are Na
+, H
+, Cl
- and OH
-.
At the anode: chloride ions lose electrons and are discharged as chlorine gas:
2Cl
- -> Cl
2 + 2e
-At the cathode: hydrogen ions accept electrons and hydrogen gas is discharged rather than sodium:
2H
+ +2e
- -> H
2The ions remaining in solution are Na
+ and OH
-. So an aqueous solution of sodium hydroxide is formed.