I have been doing past paper questions and find that there are different cell diagrams. One with platinum, one with hydrogen, one with just metal on either sides on the electrodes.
What is the difference and when they ask me to draw one how do I know which one to draw?! Electrochemical cells are used as power sources in many everyday applications. To decide what to use in a cell, it is necessary to know the standard electrode potential for electrodes. This is measured using a standard hydrogen electrode as a reference standard.
Draw a labelled diagram of the apparatus you would use to measure the standard electrode potential of an Fe3+ / Fe2+ electrode.
In the marks scheme is has H2 gas etc... so how do i know to draw that one and how do I even draw that one?! :/
Hi, could anyone tell me why the Pt electrode is generally drawn so small in the S.H.E.? It often looks like the wire attached to the Pt electrode is submerged in the solution, which surely isn't correct as then the wire would act as the electrode. Sorry, maybe this is irrelevant anyway, I'm just confused about how to draw it in an exam - should the Pt be entirely submerged in the solution or have the top half above the soln like usual?