To calculate the molality of chloride ion in the given aqueous solution, we need to first convert the concentration from molarity to molality.
1. Determine the moles of chloride ions for each salt:
For CaCl2:
- Molarity = 2 mol/L
- Moles of chloride ions = 2 moles/L * 2 L = 4 moles
For MgCl2:
- Molality = 5 mol/kg
- Moles of chloride ions = 5 moles/kg * 1 kg = 5 moles
2. Determine the total moles of chloride ions in the solution by summing the moles of chloride ions from each salt:
Total moles of chloride ions = 4 moles + 5 moles = 9 moles
3. Calculate the mass of water in the solution:
The mass of water can be determined using the specific gravity and the density of water at a specified temperature. Unfortunately, the density of water is required to perform this calculation, which is not provided in the question.
Without the density of water, it is not possible to determine the mass of water and, subsequently, the molality of chloride ions.
Please provide the density of water or any additional information required to calculate the mass of water for further assistance.