Osmosis investigation

Osmosis and Diffusion Lab Saagar Chitale 10/13/14 AP Bio Pd.5 Introduction: The first part of this three part lab was an investigation that examined the relationship between rate of diffusion and the surface area to volume ratio. To simulate this, we used an agar cube with NaOH and phenolphthalein mixed in, and dropped it in an HCl solution. As the HCL diffused in and reacted with the phenolphthalein, we were visually able to see diffusion at work. Diffusion is the movement of molecules in

Independent variable Sucrose concentration (M) (±0.01 g) This variable would impact the investigation as the higher the concentration of sucrose that is used in this experiment, the average percent change in mass in Solanum tuberosum core will decrease. This will occur due to the fact as the solute concentration begins to increase in the water, the solution will eventually become hypertonic, thus the percent change in mass of the Solanum tuberosum core will start to decrease as water molecules

the different concentrations of each substance and the process of osmosis. Particles of higher concentration move to regions of lower concentration. Introduction: Osmosis is the diffusion of water through a selectively permeable membrane. Due to the difference in concentration gradient, particles that are dissolved can go from high concentration to low concentration through a semipermeable membrane. The purpose of the investigation was to observe the effects vinegar, corn syrup, and water has on

INTRODUCTION Osmosis is the movement of water molecules from high concentration to low concentration through semipermeable membranes, caused by the difference in concentrations on the two sides of a membrane (Rbowen, L.). It occurs in both animals and plants cells. In human bodies, the process of osmosis is primarily found in the kidneys, in the glomerulus. In plants, osmosis is carried out everywhere within the cells of the plant (World Book, 1997). This can be shown by an experiment with potato

I am going to investigate osmosis when potato is placed in different  concentrations of sucrose. I am aiming to witness osmosis in 5  different concentrations of sucrose. I will use 5 varying  concentrations so that I have a wider spread to compare the results,  and check that I don’t have any anomalies  Prediction  Osmosis is the process of diffusion of water molecules from a weaker  solution into a stronger solution, through a semi permeable membrane.  The tiny pores in the membrane

How Osmosis Affects A Potato Aim: - To See How Osmosis Affects A Potato Preliminary work Prediction: -I predict that the weight of the potato in the sugar solution will decrease and the weight of water will increase. I predict that the weight of the potato in the sugar solution will decrease when it reaches 3:1 (salt: water). In put Variables: -Molarity -Size of potato -Mass of Water -Molarity of Sugar -Length of time in the solution -Temperature of water Out put variables:

Osmosis is a special case of diffusion involving water molecules, therefore making it a passive process. Although all phospholipid bilayers are somewhat permeable to water, the permeability is increased when water-channel proteins are present as they provide other pathways to pass through the membrane. The process known as osmotic flow (Freeman and Company, 2000) is where water molecules move across the semipermeable membrane from an area of low salt concentration to an area of high salt concentration

An investigation to find the water potential of potato and carrot tubers in a sucrose solution, of concentration 0.00 – 0.50Mol, over a 24 hour period Interpretation Written Communication C1 From our graph it can be seen that the concentration of sucrose solution is 0.18 M at 0% change in mass for the potato and 0.355 M at 0% change in mass for the carrot. I will use these values to find the solute potential by using the calibration graph. I will work out the water potential by using the

Introduction: Osmosis is the movement of water from a less concentrated solution to a more concentrated solution through a semipermeable membrane because it is active transport, thus going against the concentration gradient.1 This process was initially thoroughly studied 1877 by German plant physiologist, Wilhelm Pfeffer.2. For Osmosis to occur, it requires two solutions with different concentrations and a partially permeable membrane to separate them. Since the water diffuses towards the more concentrated

When plant tissues are immersed in sucrose solutions of different concentration, the cells will gain or lose water by osmosis and therefore change in size and mass. If the potato samples are immersed with hypertonic solution, the mass of samples will be reduced as the hypertonic solution has a higher solute concentration which makes the water move towards it. If the potato