Free essay: the effect of osmosis in potato cells with different concentrations of sucrose solution aim: to test the effect of different concentrations of. Lab 1c: pour 100ml of the assigned sucrose solutions into their 250ml beakers (pre-labeled) obtain a large potato using a core borer, take 24 samples out of the potato, and measure each in centimeters so that they are all equal in length ( use the knife to slice off ends) make sure not to leave any skin with the samples. Revise how substances can move into and out of cells through diffusion, osmosis and active transport cut equal-sized pieces of potato blot with tissue paper and weigh put pieces into different concentrations of sucrose solution for a few hours remove, blot with tissue paper and reweigh the percentage change in mass. Remember too, that if you are interested in connection with osmosis, there are other substances that will affect the water potential of the potato - anything that is in solution in the cell sap (proteins, amino acids etc) will add to the osmotic potential the turgor of the cells will affect the water potential because it affects the wall.
Is placed in a solution of lower water potential, water will leave its cells by osmosis in this case, the plant tissue will decrease in size as the plant cells shrink upon losing water for this activity, you are required to design and perform an experiment to determine the water potential of potato tissues using sucrose solutions of. This process involves the movement of water, through a semi-permeable membrane, from an area of high concentration to an area of low concentration in this lab you will observe osmosis occurring through membranes of potato cells four different solutions will be employed, each with a different concentration of sucrose. Osmosis potato mass contents in test tube initial mass of two potato strips final mass of two strips mass difference change in mass% a) distilled water 17g 18 b) 10 m sucrose 17 10 c) 08 m sucrose 20 15 d) 06 m sucrose 18 15 e) 04 m sucrose 19 17 f) 02 m sucrose 16 17 describe how the potato.
The general trend for the graph is that it starts high on the left and slopes down to negative values on the right this is because for distilled water and the low concentration of sugar solution (02moll-1) there was an increase in the mass of the potato chips for the higher concentrations of sugar solutions (04moll-1 to. Osmosis the effect of increasing sucrose concentration on the mass of potato chips february 23, 2014 centre number: 002223 candidate number: 0028 momina amjad biology ia: osmosis 002223-0028 1 research question: the potato chips are submerged in a range of sucrose solution concentrations. Jennie lace 10c how does the concentration of a sucrose solution affect the rate of osmosis in potato cells plan i have chosen to investigate how the rate of osmosis taking place in potato cylinders varies when i change the concentration of the surrounding sucrose solution i will vary the concentration of sucrose in the. Assuming that it's a very high concentration sugar solution, the sugar solution would have a lower water potential than the cells of the potato through the process of osmosis, water will move from a region of high water potential (' concentration') to low water potential therefore, water will slowly leave the cells of the potato.
The effect of placing pieces of potato in a sucrose solution [image]osmosis osmosis what is osmosis if two solutions of different concentration are separated by a semi-permeable membrane which is permeable to the smaller solvent molecules but not to the larger solute molecules, then the solvent will tend to diffuse. -know how hypertonic, hypotonic, isotonic effect the bags (cells) in the osmosis experiment -know how to calculate the cumulative percent weight of change the bags were weight every 15 minutes for 45 minutes the dialysis tubing that was used in permeable to water but not to sucrose bag solution in bag.
Continue adding sucrose to the solution until it reaches a concentration of 075 m at 20º c at standard atmospheric increases, the potential for the water in that solution to undergo osmosis decreases therefore, the more molar concentration of sucrose with water potential that is equal to the potato tissue water potential. The aim of this work was to evaluate the osmotic dehydration of sweet potato ( ipomoea batatas) using hypertonic sucrose solutions, with or without nacl, at three that adding nacl to the solution resulted in an increase of the osmotic pressure gradients and, hence, higher water loss values throughout the osmosis period. Investigation of factors affect osmosis in potatoes aim the aim of the following experiment was to investigate the effect of varying the concentration of sucrose solution on osmosis in a potato preliminary experiments one preliminary experiment was done before the main experiment from the preliminary.
The purpose of this investigation is to examine the effect of varying the concentration of a sugar solution (sucrose) on the amount of osmotic activity between a potato piece and the solution introduction osmosis is a special type of diffusion which involves the movement of water molecules through a. Osmosis can be easily demonstrated in biological systems using potato strips, water and salt or sugar solution picture remember that osmosis is 2 petri dishes with equal volumes of solutions a and b a = sucrose or salt solution ( hypertonic solution) b = distilled water ( hypotonic solution) 1 empty petri dish ( control.
E after at least 15 minutes, remove each potato piece and blot it dry measure and record its mass again method you are going to measure osmosis in plant tissue, by comparing the mass of the tissue before and after soaking in sucrose solution sucrose is used because the molecules are too large to diffuse through cell. Sucrose solution g 4 potato cells contain a weak sucrose solution in your pair, build a pot model to represent either potato in distilled water, or potato in concentrated sucrose solution the 'pot model' will be used to represent the movement of water across a partially permeable cell membrane 2 strong elastic. Set up your potato practical dry a piece of potato (of around 15 g) on a paper towel accurately weigh it and put it into a beaker of distilled water weigh a second similar piece from the same potato put this piece into a beaker of sugar ( sucrose) solution record the mass of the potato pieces before you place them into the. The effect of sucrose solution concentration on osmosis in potato chips plan i am going to cut six pieces of potato using a borer they will all the same weight i will make them all 07g i will be able to make sure they are all the same weight- using scales if a piece of potato is too big i will use a scalpel and a tile to trim it so.