Coion vs. Counterion
Coionnoun
(chemistry) Any ion of the same charge as another in a solution or other electrochemical system.
Counterionnoun
(chemistry) Any ion of opposite charge to another in a solution or other electrochemical system
Counterion
A counterion (pronounced as two words, i.e. , and sometimes written as two words) is the ion that accompanies an ionic species in order to maintain electric neutrality.
