Final answer:
The concentration of a solute depends on the volume of the solvent, so the concentration of Barium Fluoride would be different when dissolved in water and ethanol.
Step-by-step explanation:
The concentration of 10.5983g of Barium Fluoride dissolved in water would not be the same concentration if the Barium Fluoride was dissolved in ethanol instead. The reason for this is that the concentration of a solute depends on the volume of the solvent. Since water and ethanol have different densities, the same mass of Barium Fluoride would occupy different volumes when dissolved in water and ethanol. Therefore, the concentration would be different in the two solvents.