A 1:3 electrolyte in an aqueous solution is

Step-by-step solution

A 1:3 electrolyte dissociates in an aqueous solution to give one cation and three anions, or vice versa, producing a total of four ions per formula unit. [ Co(NH ₃)₃( NO ₂)₃] is a neutral complex and does not dissociate into ions. It is a non-electrolyte. [ CoCl ₂( NH ₃)₄] Cl [ CoCl ₂( NH ₃)₄]⁺ + Cl ⁻ (1:1 electrolyte) [ CoCl(NH ₃)₅] Cl ₂ [ CoCl(NH ₃)₅]²⁺ + 2 Cl ⁻ (1:2 electrolyte) [ Co(NH ₃)₆] Cl ₃ [ Co(NH ₃)₆]³⁺ + 3 Cl ⁻ (1:3 electrolyte) Thus, [ Co(NH ₃)₆] Cl ₃ is a 1:3 electrolyte. Answer: [ Co(NH ₃)₆] Cl ₃