Potato Lab Report: Effects of Sucrose Solutions on Potato Cells and Water Potential Abstract: Osmosis is a process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one‚ thus equalizing the concentrations on each side of the membrane. In this experiment‚ we learn about Osmosis and Diffusion through potato cores in different concentration of sucrose‚ (water‚ .2‚ .4‚ .6‚ .8‚ 1.0). We realized
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THE EFFECT OF THE WATER CONCENTRATION GRADIENT ON THE RATE OF OSMOSIS Investigation Folio: Summative Stage 1 Biology: SEMESTER 1 2014 MARCIA SHAW - 151003X INTRODUCTION Diffusion: is when something spreads more widely from a higher concentration gradient to a lower concentration gradient. Diffusion is the process from which molecules‚ atoms or ions mingle together and move from an area of high concentration to an area of low concentration as a result to their kinetic energy. for example
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Title: Osmosis and water potential Aim of the experiment: Finding the water potential of potato. Biological principles: Independent variable: concentration of the solution. Dependent variable: percentage changed in weight of the potato strips. Controlled variable: size of the potato strips‚ it can be controlled by cutting the length of the strips. Procedure: Table 1. Concentration of sucrose solution table Concentration/ M | Sucrose Solution/ ml | Distilled
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selectively permeable membrane is a special case of diffusion known as osmosis. Osmosis results in the movement of water from an area of lower concentration of dissolved material to an area of higher concentration of dissolved material. For a demonstration of this principle‚ a purple onion cell is going to be bathed in different concentrations of salt (NaCl) water. Problem: How do solutions of various salt concentrations influence osmosis in relation to an onion cell?
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Name: Lawrence D. Mandras Date: August 17‚ 2013 Rating:_____ Yr. & Course: BSED-IV Laboratory Experiment no. 2 The Living Plant Cell Objectives: * To study the different types of plant cells. * To observe plant cells as to their shapes‚ structures and function. Materials: Microscope cover slip glass slide water onion Iodine soln. hydrilla salt tomato razor blade Medicinal dropper epidermal tissue of rhoeo-discolor
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Abstract Literature on Van’t Hoff’s law states that water potentials and zero weight change osmolalities will be the same for potato cores placed in varying concentrations of solutes of NaCl‚ glucose‚ and sucrose. This experiment was designed to test these predictions and compare them to data gathered course wide. We found that the mean water potentials were all within 0.26 bars of each other‚ and that the zero weight change osmolalities were all within 0.035 mols of each other. This supported Van’t
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though the stomates open to release water‚ it also brings in carbon dioxide to produce sugar and oxygen through a process of photosynthesis. The water absorbed by the roots is moved by osmosis‚ root pressure‚ adhesion‚ and cohesion from high to low areas of water potential. From the roots‚ water is transported with osmosis with a pressure pulling the water and minerals up towards the leaves. It is the transpirational pull moving it up with the help of cohesion and adhesion. Transpiration decreases the
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The Uses of water in Living Things Topics I have chosen to cover: - Osmosis & Water potential - Condensation & Hydrolysis Reactions - Digestion – the importance of water - Blood and tissue fluid To emphasise the sheer importance of water in living things and to put the content of this essay in to perspective‚ I am firstly going to inform you that the human body is approximately 50-75% water. Without water our body would be unable to successfully perform the numerous complex reactions and
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LAB REPORT 1 - LAB 7 CELL MEMBRANE FUNCTION Marisela Camacho Legarreta June 30‚ 2013 ACTIVITY 1 INTRODUCTION Be aware that all molecules have kinetic energy‚ which means that is an active energy that is always in motion. Molecules move in all different ways and this create an evenly distributed movement which is best known as diffusion. Diffusion is the movement of molecules from a region of their higher concentration to a lower concentration. METHODS Check the reaction of different
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cell and because of that the water potential outside the cell would be lower than inside the cell. This would cause water (turgor pressure) to be lost by Osmosis. Osmosis is the net movement of water from high pressure to low pressure across a partially permiable membrane and it is that reason that it requires no energy for the movement. Osmosis eventually stops/slows down when water pressure has become balanced out between the “movements”. Planning & Implementing In this study I will use different
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