List the ions in solution in the electrolysis of conc. sodium chloride

Chloride ions Cl - (aq) (from the dissolved sodium chloride) are discharged at the positive electrode as chlorine gas, Cl 2 (g) sodium ions Na + (aq) (from the dissolved sodium chloride) and hydroxide ions OH - (aq) (from the water) stay behind - they form sodium hydroxide solution, NaOH (aq)