AP BIOLOGY

Detailed explanation-1: -Hypotonic solution means the dissolved solute concentration will be more concerning the concentration of the solutes inside the dialysis bag. Thus, through the mechanism of osmosis, water will enter the dialysis tube, and the bag will swell up and result in the gain mass.

Detailed explanation-2: -Why did you calculate the percent change in mass rather than simply using the change in mass? Calculating the percent change is more accurate when we are looking for a cross comparison between multiple sets of data. Finding the mass difference is only relevant for sets of data that started with the same mass.

Detailed explanation-3: -If the concentration of sucrose increases then the osmotic pressure will increase, measured by amount of solute that is displaced up the glass tube in the osmometers we created. Osmosis is defined as the flow of water (H2O) from areas of high concentration to areas of low concentration across a semi-permeable membrane.

Detailed explanation-4: -It is a directly proportional relationship between the change in mass and molarity of sucrose because as the amount of sucrose in the dialysis bag increases, the change in mass also decrease, and the less sucrose will decrease the mass of the bag due to lower water potential in high solute.