You conduct an experiment to determine the concentration of ions in an unknown solution. you place 300ml inside a dialysis bag and place the bag into a beaker of water with an ion concentration of 100 ppm (parts per million). when you check the experiment an hour later, the water levels in the beaker and the dialysis bag have not changed. what can you conclude? a. the concentration of ions of the unknown solution is more than 100 ppm. b. the concentration of ions of the unknown solution is less than 100 ppm. c. not enough information to determine. d. the solutions have the same concentrations

Option D, The solutions have the same concentrations

Explanation:

The concentration of ions in unknown solution is not known thus a 300mL of  solution is placed inside a dialysis bag and which is then placed into a beaker of water with an ion concentration of 100 ppm.

Now an ion move across a boundary only when there is difference of concentration of ions between the two solutions across a membrane.  

Here in this case if the concentration of ion is high in unknown solution as compared to the 300 ml solution , then the ion must move from unknown solution to 300 ml solution thereby increasing its ion concentration above 100.

On the other hand if concentration of ion is low in unknown solution as compared to the 300 ml solution , then the ion must move from 300 ml solution to unknown solution thereby decreasing its ion concentration below100.

Since there is no change in the ion concentration after one hour , thus the number of ions in 300 ml solution and unknown solution is same.

Thus, option D is correct