Final answer:
Osmolarity of a solution is determined by the number of moles of solute per kilogram of solvent. Dissociation of salts in water gives a different number of ions, leading to different osmolarities for different salts. The solution with the highest osmolarity will have the highest concentration of solute.
Step-by-step explanation:
The osmolarity of a solution is determined by the number of moles of solute per kilogram of solvent. In this case, we can determine the osmolarity of each solution by considering the number of ions that are produced when the salts dissociate in water. For example, NaCl dissociates into Na+ and Cl- ions, so its osmolarity is twice the concentration of NaCl. Similarly, CaCl2 dissociates into three ions, so its osmolarity is three times the concentration of CaCl2.
Based on this information, we can determine the osmolarity of each solution and compare them to find the one with the highest osmolarity.