When CoCl2 dissolves in water, it dissociates into Co2+ and Cl- ions. Each formula unit of CoCl2 produces one Co2+ ion and two Cl- ions. Therefore, 0.27 mol of CoCl2 will produce:

0.27 mol CoCl2 * 1 mol Co2+ / 1 mol CoCl2 = 0.27 mol Co2+

0.27 mol CoCl2 * 2 mol Cl- / 1 mol CoCl2 = 0.54 mol Cl-

The total number of moles of ions released is:

0.27 mol Co2+ + 0.54 mol Cl- = 0.81 mol ions