Sucrose solutions

they are put into different solutions of different concentrations. The plamolysis of onion skin was tested under water, 0.3M sucrose, and 2.0M sucrose. The water was hypotonic to the onion cells causing the cells to become larger and less pigmented. The sucrose was hypertonic to the cells leading to osmosis and the cells to become shriveled and more pigmented as the color was left in the cells. Observed from the experiment, the higher the concentration of the sucrose the smaller the cells became

isotonic. “If two solutions have unequal osmotic concentrations, the solution with the higher concentration is hypertonic, and the solution with lower concentration is hypotonic.” (Raven et al. 98) “When two solutions have the same osmotic concentration, the solutions are isotonic.” (Raven et al. 98) My hypothesis was that the bags placed in hypertonic solutions would shrink because the water would leave the bag to go to the higher concentration. The bags placed in isotonic solutions would stay the

Results The control group’s rate of change remained at a consistent at no rate of change. The 20% and 40% concentrations of sucrose in the dialysis bags had consistent rates of change in mass over 30 minutes while the 60% concentrations of sucrose in the dialysis bag did not have a consistent change. The dialysis bag with 60% concentrations of sucrose in the beaker of water had a consistent change of rate through osmosis. The rate of change for the control, or Bag 1, was 0 g/min. Bag 2 and 5 had

concentration of the sucrose solution is increased then the mass of each cube, will also increase, thus the percentage gained will also increase. The graph above indicates that as the concentration of sucrose solution (%) is increased, the percentage change in mass decreases, thus it can be supposed that there is a negative correlation between the sucrose concentrations and the mass of potato cubes. It is also apparent from the graph above that an error has occurred during the 15% sucrose trial as it appears

conditions that a cell may be subjected to in the cells physical environment. The cells may be isotonic, hypotonic, and hypertonic. Isotonic is when the cell and is environment have equal concentrations of solutes. Therefore cells in an isotonic solution do not experience osmosis. When the cell is hypotonic it has a lower concentration of solutes so water will move out of the cell. When the cell is hypertonic, it will have a higher concentration of solutes and water will move into the cell to

The 0.0 M to 0.2 M sucrose solutions remained positive on the graph in figure one, while steadily approaching 0.00% mass difference. When the concentrations were 0.3 M to 0.5 M sucrose the percent mass difference became negative, decreasing continuously. As shown in Figure 1, the control 0.0 M sucrose solution yielded the highest percent mass difference (13.24%). From there, the percent difference in mass continually decreased in the treatment sucrose solutions; 0.1 M yielded a 4.76% difference,

Adriana Alvarez 2/19/16 Diffusion and Osmosis Lab Report Diffusion and Osmosis Lab Report Introduction In this experiment, potatoes and glucose were used in order to simulate the process of cells maintaining a normal state in aqueous solutions. The cell will move certain solutes across the membrane of the cell by a process called diffusion. Diffusion is a process in which molecules from a high concentration to a low concentration in order to reach a state of equilibrium (Lab Manuel 94). If

discovered by RJH Dutrochet in 1826, has been a significant area of interest in biology since. Osmosis is the process of diffusing water molecules through a selectively permeable membrane to dilute solutions with high concentrations of solutes until that solution has the same concentration as the solution on the other side of the membrane (Freeman, n.d., p. 96-99). An important component of osmosis is diffusion, which is when molecules or ions in the presence of a concentration gradient move from

and place the bags in solutions of either 30% sucrose or reverse osmosis water (RO water). Two bags held RO water and the two other bags held either a 15% or 30% sucrose solution. We then observed and recorded the mass of the bags over the course of an hour to determine in which direction the osmosis occurred for each bag and at what rate. Before we started we hypothesized that if water flows from a higher concentration of water to a lower concentration, then the bags of sucrose should get heavier until

potential and osmolality of potato cores after being soaked in NaCl and sucrose solutions and to compare them to each other and the expected water potentials and osmolalities from the literature. We did this by weighing potato cores, soaking them in the NaCl and sucrose solutions, and then weighing them again. This information was used to find the percent weight change of the potato cores. The potato core’s water potential mean for sucrose was -9.86 bars and for NaCl it was -10.72 bars. The osmolality that