Final answer:
To test the CaCl2/H2O combination, calculate the molality, apply colligative properties to find freezing and boiling point changes, and measure temperature changes to determine the heat of dissolution and whether the process is exothermic or endothermic.
Step-by-step explanation:
To test the CaCl2/H2O solute/solvent combination, you would first calculate the moles of calcium chloride (CaCl2) based on its given solubility, which is 60 g per 100 g of water at 0°C. You then convert this mass to moles to find the molality of the solution. With the molality, you can calculate the change in freezing and boiling points using the colligative properties of solutions, and for CaCl2, it's important to consider the dissociation into three ions in these calculations.
To determine the thermal effects of dissolution, you would measure the temperature change upon dissolving a known mass of CaCl2 in water and apply the specific heat equation to find the heat involved. The sign of the temperature change indicates whether the reaction is exothermic or endothermic.