Without losing its concentration, `ZnCl_(2)` solution can't be kept in contact with

Without losinf its concentration, ZnCl_(2) solution can't be kept in contact with

The concentration of ZnCl_(2) solution will change when it is placed in a container which is made of :

If 2 mL of acetone is present in 45 mL of its aqueous solution ,calculate the concentration of this solution , calculate the concentration of this solution .