Each of these ionic substances fully dissociates into ions when dissolved in water.
One mole of each of the following substances is dissolved in 1 dm3 of water.
Which solution contains the greatest number of ions?
Aluminium sulfate, Al2(SO4)3\text{Al}_2(\text{SO}_4)_3Al2(SO4)3
Sodium phosphate, Na3PO4\text{Na}_3\text{PO}_4Na3PO4
Calcium chloride, CaCl2\text{CaCl}_2CaCl2
Ammonium nitrate, NH4NO3\text{NH}_4\text{NO}_3NH4NO3
