Edexcel IAL Chemistry A2 16.4 standard hydrogen electrode
Edexcel IAL Chemistry A2 16.4 standard hydrogen electrode
A full SHE diagram needs platinised platinum, H2 at 100 kPa, 1 mol dm-3 acid, 298 K, a salt bridge and a linked reference half-cell.
How this is tested
- Label Pt or platinum black, H2 at 100 kPa, 1 mol dm-3 H+ and 298 K in diagrams.
- Connect the SHE to another half-cell with a salt bridge and high-resistance voltmeter.
- Explain why platinum black increases the rate of the H2 and H+ equilibrium.