Final answer:
The calcium ion concentration in 1.5 M calcium chloride solution is 1.5 M, while the chloride ion concentration is 3.0 M because each unit of calcium chloride provides two chloride ions.
Step-by-step explanation:
The calcium ion concentration in a 1.5 M calcium chloride solution is calculated based on the fact that each formula unit of calcium chloride (CaCl2) yields one calcium ion (Ca++) when it dissolves into the solution. So the concentration of calcium ions will be the same as the concentration of the calcium chloride solution, which is 1.5 M.
On the other hand, we consider the chloride ion concentration in the solution. Since each formula unit of calcium chloride provides two chloride ions (Cl-), we need to double the concentration of the salt to find the concentration of chloride ions.
Thus, the chloride ion concentration will be 3.0 M (1.5 M×2=3.0 M) because there are two chloride ions for each unit of calcium chloride.