I have been looking at this for 2 hours and I'm missing something very basic.
I have three solutions: 25mL of A, 50mL of B, 100 mL of C. They all have the same solution density, which is unknown. All contain 0.041 moles of ions (aqueous ionic solution). However, I don't know what these ions are, but each solution has a particular number of ions of various charges and sizes drawn in the solutions: A has 8 ions, B has 10 ions and C has 12 ions. I calculated molarity for each at 1.64, .82 and .41 since I know the number of moles and the mass of the solution.
In trying to calculate molalities, I need the moles of solute (which I know) and the mass of the solvent, and it's the latter I'm stuck on.
Would someone point me in the right direction? I just don't see how I can calculate the mass of the solvent (even if I assume it's highly diluted and use molarity instead).
Thanks!