Preferably, {TAIL ~ the metal} of {HEAD ~ the water soluble salt} will be multivalent, i.e., it will have a valence greater than 1 
Preferably , { TAIL ~ the metal } of { HEAD ~ the water soluble salt } will be multivalent , i.e. , it will have a valence greater than 1
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH