CATION

The positively charged particle or ion in an electrolyzed solution which travels to the cathode and is there discharged, evolved, or deposited. Also, by extension, any positive ion. The common cations present in lakes in normal order of decreasing concentrations follows: calcium (Ca++), magnesium (MG++), potassium (K+), sodium (Na+), ammonium (NH4+), ferric iron (FE+++), or ferrous iron (FE++), manganese (Mn++), and hydrogen (H+).