I am doing a lab for school and I do not know what this question is asking. In this lab we are making electrochemical cells from different metals.
You have a standard pot of liquid electrolyte into which are dipped non-touching same-spaced paired strips of different clean metals. The external circuit between the strips is a sensitive voltmeter (with extremely high electrical resistance - hard by zero current flow). You measure the potential (noting direction!) between all combinations of paired strips, (n)(n-1)/2, and then draw certain conclusions.
Why are amalgams saturated with respect to excess solid metal interesting substrates for this experiment (e.g., aluminum)? How do you construct a standard hydrogen electrode?