How to obtain sugar from a solution of sugar in water? Why will filtering not work?

Which aqueous solution of ki freezes at the lowest temperature? 1) 1 mol of ki in 500. g of water 2) 2 mol of ki in 500. g of water 3) 1 mol of ki in 1000. g of water 4) 2 mol of ki in 1000. g of water

Will a solution form when the solvent and solute are both nonpolar? a. not likely b. never c. most likely

In the diagram here that represents the reaction, which reactant, a or b, is the limiting reagent?