Final answer:
To obtain a 1.6 M solution of CuCl2 with 0.456 moles of CuCl2, you would need 0.285 liters of water.
Step-by-step explanation:
To determine the volume of water needed to dissolve 0.456 moles of CuCl2 and obtain a 1.6 M solution of CuCl2, we can use the formula Molarity = moles of solute / volume of solution. Rearranging the formula, we have volume of solution = moles of solute / Molarity.
Plugging in the values, we get volume of solution = 0.456 moles / 1.6 M = 0.285 L. Therefore, 0.285 liters of water are needed to dissolve 0.456 moles of CuCl2 and obtain a 1.6 M solution of CuCl2.