how to determine anode and cathode in a SCE?

Answer 1

An SCE is only ONE half cell. Two half cells are required to make a cell. The SCE may be EITHER an anode OR a cathode depending upon the other electrode. The anode is the electrode at which oxidation occurs and the cathode is the electrode at which reduction occurs.

Answer 2

So if Ag2CrO4 the metal wire in a SCE is used then that and Hg2Cl2 would have to be either the anode or cathode.

Answer 3

Where did the Ag2CrO4 come from?