The conductivity of dilute aqueous solutions of CaCl\-2, CaCl\-2\|NaCl, CaCl\-2\|KCl have been determined at 298.15 K. The limiting molar conductances, association constants and ion size are evaluated by means of the Fuoss\|Onsager equation. The ion association of CaCl\-2 has been discussed, and the mixtures have been correlated as pseudo binary electrolytes.