Reference electrodes Hydrogen electrode(SHE) The ultimate reference electrode. Diffiault to work with. H2 is constantly bubbled into a 1 M HCI solution Pt H2 (latm),IM H'/ Pt black- Eo=0.000000V plate 1 M HCI
Reference electrodes Ag/AgCl Another common reference electrode. Easier to produce a combination electrode. Ag wire saturated AgCl/KCI AgCl
Membrane electrodes A potential difference is created across a membrane that can be measured. There is no change in the Ag wire solution or actual contact. 0.IN HCI pH electrode AgCl -first discovered ·still the most significant thin relies on a glass membrane. glass wall
PH electrode Combination electrode The reference electrode is inside of the pH electrode
pH electrode Combination electrode The reference electrode is inside of the pH electrode