an electrolyte solution containing water, {HEAD ~ the electrolyte solution} being added into said container to be mixed with {TAIL ~ said electrolyte}; and 
an electrolyte solution containing water , { HEAD ~ the electrolyte solution } being added into said container to be mixed with { TAIL ~ said electrolyte } ; and
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH