Investigating the concentration of the solutions inside the vacuole of a potato cell. :: essays research papers

Osmosis InvestigationWe are trying to find out what the closeness of the solutions is inside the vacuole of a white potato vine cell.We will investigate how the mass of the potato breaks change in different sucrose solution concentrations.We will use osmosis to do this.I will be measuring and controlling many different variables, these include -The dependent variable Weight of potato chipIndependent Variable Concentration of sucroseControl Variables consist of -1.Temperature2.Surface area of potato3.Volume of sucrose solution4.Same time for each potato chip submerged in solution5.Potato chips all from same potatoThe effects on the dependent variables all differ here is how the main variables in my experiment work out.Variable Effect on Dependent Variable Surface area of potato chipThe greater the surface area the more than water it will be able to absorbSame chip from the same potatoThe genetic make-up will be the same and accordingly the partly permemble membrane will be si milarTime left in the solutionThe longer spent in solution the more that is wrappedCoating on the potato chipsIf not rinsed off and dried after a certain period of time the chips will form a cake of sugar thus decreasing surface areaQuantitative prediction I predict that the effect of changing the sucrose concentration will be that as the concentration of the sucrose solution increases, first of all the mass of the chip will increase, and then the change in mass will step by step decrease until mass is lost and this mass loss will gradually increase in amount.Because when the sucrose concentration is low, the concentration of water right(prenominal) the cells of the potato chips will be greater than that inside, and therefore water will osmosis into the cells of the chip which will gain mass. As the concentration of sucrose increases the concentration of water outside the call will eventually wrench less than inside the cells of the chip and mass will be lost.DependentVariableIn side the cells Outside the cells trim down solution Concentrated solutionHigher water concentration Low water concentrationKey= Sucrose particle= water molecule= osmosis= partly permeable membraneIn the higher sucrose concentration solution, the net movement of water (osmosis) is to the outside of the cell, and the chip will lose mass, the cells will become plasmolysed.The chip in a low concentration of sucrose solution, is the opposite of the diagram above, in that the water osmoses into the cells of the chip, mass it gained, through osmosis of water into the plant cells, the cells will become turgid.