question_answer 19)

A solution is obtained by mixing 300 g of 25% solution and 400 g of 40% solution by mass.

Answer:

300 g of 25% solution contains solute =                 400 g of 40% solution contains solute   Total mass of solute = 160 + 75 = 235 g Total mass of solution = 300 + 400 = 700 g Percentage of solute in the resulting solution   Percentage of water in the resulting solution = 100 - 33.5 = 66.5%