Question

"A student filled a dialysis tube with 97% water solution and sealed the ends. The tube and its contents had a mass of 55 grams. The student placed the tube in a solution, and the mass of the tube and its contents increased to 60 grams. Into which solution was the dialysis tube placed?

(1)0% water
(2)95% water
(3)97% water
(4)99% water"

Answer 1

The answer is
(4) 99% water
If the 97% water solution dialysis tube is placed in a 99% water solution, the concentration of the solute inside the dialysis tube is greater than the outside. To reach equilibrium, the water outside will enter the dialysis tube causing an increase in the weight of the tube.