The bismuth may be present in the cathode 23, 24 in various forms such as Bi4 , BiO2 , Bi metal, Bi3+, and {HEAD ~ various transient Bi2+ and Bi+ species}, depending on {TAIL ~ the electrode potential} 
depending on
The bismuth may be present in the cathode 23 , 24 in various forms such as Bi4 , BiO2 , Bi metal , Bi3 + , and { HEAD ~ various transient Bi2 + and Bi+ species } , depending on { TAIL ~ the electrode potential }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL