A solution is obtained by mixing 300g of 25% and 400g of 40% solution by mass. calculate the mass percentage of the resulting solution.
300g of 25% solution contain solute= 300×25/ 100 = 75g 400g of 40% solution contains solute = 400× 40 / 100 = 160 g Total mass of solute = 160g + 75g = 235g Total mass of solution = 300g +400g =700g % of solute in the final solution= 235/700 ×100= 33.5% % of solvent in the final solution = 100-33.5= 66.5% Ans
