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  • Two Transfer Pipettes Of The Gatorade Solution
    734 words
    The Effect of Concentrations of Starch and Sugar Solutions on Synthetic Semi-Permeable Membranes By: Jamie Hardy Question: Is dialysis tubing selectively permeable? Hypothesis: If one has dialysis tubing, which is dipped in water, filled with Gatorade and starch and is left for 15 minutes, the sugar in the Gatorade will exit the dialysis and into the water. So the dialysis is semi-permeable. Materials: 16 cm dialysis tubing beaker cylinder test tubes transfer pipettes Gatorade Starch solution 10...
  • Water For L.A. From Other Resources
    2,786 words
    Introduction The Central Valley (also known as the Great Valley) is one of the most developed farming communities in the United States, and possibly the world. It is over four hundred and thirty miles long, and an average of fifty miles wide (about the size of England). It is totally enclosed by mountains including the Sierra Nevada. It is about one of the worlds largest valleys stretching from Redding to Bakersfield. It has two main water supplies, which are the Sacramento (from the north) Rive...
  • Potato Cylinder From The Distilled Water Solution
    808 words
    Potato Osmosis Introduction: A shipwrecked sailor is stranded on a small desert island with no fresh water to drink. They know they could last without food for up to a month, but if they didn't have water to drink they will be dead within a week. Hoping to postpone the inevitable, their thirst drives them to drink the salty seawater. They are dead in two days. Why do you think drinking seawater killed the sailor faster than not drinking any water at all? Today we explore the cause of the sailor'...
  • Exposure Solution In The Test Tube
    881 words
    MATERIAL AND METHODS Stability of cell membrane using pHF or the lab experiment for testing the stability of beet cell membranes using pH, many materials were used as follows. Obtaining a beet we punch out cores, using a cork borer. After washing the cores we put each one inside a separate test tube, and added a different pH solution in each one. After 3 minutes in these exposure solutions, we took the beet out with a dissecting needle. Then transferred each beet to a separate test tube containi...
  • Solute Concentration External To The Cell
    1,562 words
    The aim of this experiment is to investigate the movement of water into and out of plant cells by osmosis. The cells chosen for study will be taken from potato tubers as they provide a ready supply of uniform material. Any substance dissolved in water is called a solute; a solvent is a liquid that is able to dissolve another substance, called a solute, to form a solution. The water content of plants varies depending on environmental conditions. In Land plants this water plays a vital role in the...
  • Water Potential Within The Cell
    665 words
    1. a) Bulk movement is the overall movement of a fluid. The molecules all move in the same direction. Diffusion however is the random movement of molecules which usually results in a fairly even distribution. In other words the movement is not guaranteed to move in one direction but the probability that it will move in the lower gradient is greater. Osmosis is similar to diffusion but is differentiated by the membrane's behavior. The cell membrane does allow water to move from higher to lower co...
  • Thermometer And Wire Into The Test Tube
    526 words
    Question: What is the solubility curve of KNO 3 Prediction: Draw a sketch to show the shape of the curve you expect for the solubility of a typical solid dissolving in water at different temperatures. Plot solubility on the y-axis and temperature on the x-axis. Materials: Large test tube Balance Stirring wire Two-hole stopper to fit the test tube, with a thermometer inserted into one hole 400 mL beaker graduated cylinder or pipette or burette hot plate or Bunsen burner with ring clamps and wire ...
  • Diffuse Through The Dialysis Bag's Membrane
    815 words
    Diffusion LabProblemWill starch, water, glucose, iodine or a combination of the above diffuse across the membrane of the dialysis bag causing the bag to either expand or shrivel? Hypothesis & Strategy I believe that the smaller molecules, such as glucose and water will diffuse through the dialysis bag's membrane causing it to expand, due to the concentration gradient. I would test this hypothesis by filling the bag with a solution consisting of water, glucose and starch, tie it off and weigh it....
  • Length And A Strong Sugar Solution
    530 words
    These results show that a potato chip placed in water will gain in length, a weak sugar solution will lose length and a strong sugar solution will lose length also. The results from this test will allow me to choose an appropriate range of moralities in order to find out what the concentration is inside the cell vacuole. I am going to investigate 0.0, 0.2, 0.4, 0.6, 0.8 and 1.0 molar sugar solutions. I have chosen these concentrations to try and accurately find when there is no net movement of w...
  • Water Potential Of The Cells
    1,262 words
    DETERMINATION OF THE WATER POTENTIAL OF POTATO TUBER CELLS. Method. Five sucrose solutions with varying molarity and one control containing distilled water were prepared and poured into test tubes. The potato discs were dried, weighed and added to the test tubes. The discs were then weighed again after a period of 24 hours. The percentage change in mass was then calculated. Apparatus. Specimen tubes with stoppers x 6 1 cm 3 diameter cork borer razor blade filter papers balance distilled water su...
  • Potatoes Cylinders In Higher Water Concentrations
    2,908 words
    Aim: The aim of this experiment is to investigate the movement of water into and out of plant cells by osmosis. The cells chosen for study will be taken from potato tubes as they provide a ready supply of homogeneous material. I did the investigation in two parts, the first part of my investigation was my preliminary investigation and then I did my official investigation. In both of my investigations there are several similarities, such as fair testing, variables, key variables, reliability of e...
  • Water Molecule In A Hydrogen Bond
    1,275 words
    Properties of Water Water is essential for life as we know it on earth. It is used by plants and animals for basic biological processes which would be impossible without the use of water. The origin of all life can be traced back to the water in the Earth's precambrian seas. Water is also the universal solvent. It reacts with more elements and compounds than any other substance known to man. Water is a polar molecule made up of on atom of hydrogen and two atoms of oxygen. It is attracted to itse...
  • Solution In The 100 Acetone Tube
    1,432 words
    Abstract This is an experiment on how chemical stress effects cell membranes, specifically the tonoplast of Beta vulgaris taproot cells. This experiment involved the treatment of the aforesaid cells with different concentrations of an acetone solution, and testing the resulting solution for absorbance of light by betacyanine, using a spectrophotometer. It had been hypothesized that the higher the concentration of acetone in the solution, the higher the concentration of betacyanine in the resulti...
  • Ice Cube Dilemma Regular Soda
    742 words
    Lab Report Purpose of Experiment We are conducting this experiment to determine if; ice melts faster in regular soda or diet soda, ice melts faster in regular soda or water, ice melts faster in sugar solution or water or ice melts faster in salt solution (Mg SO 4) or water. Description of Experiment Different solutions of water, regular soda, diet soda, sugar solution and salt solution will be placed in beakers, weighed and acclimated to room temperature. Water will be used as the control. A col...
  • Boiling Tube Of 1 Molar Salt Solution
    386 words
    Biology Coursework Problem A cook wishes to prepare chips for a meal the following day. How does the cook keep the chips so that they will stay fresh. Experiment 1 Background Potatoes have selectively permeable membranes (cell membranes) that lets water move from cell to cell by osmosis Plan I am investigating what you should keep chips in to keep them fresh. I will try to keep the chips the same weight and I will put them in the same amount of liquid solution. Hypothesis I think the chips shoul...
  • Osmotic Potential Of The Solution
    510 words
    Introduction The presence of solutes in water causes the osmotic potential to decrease and it reduces the free energy of water. This is because water molecules will tend to bind to the solutes rather than moving freely and away from the solution. If cells are surrounded by a solution that has an osmotic potential more negative (lower) than that inside the cell, water will move from inside the cell (higher water potential) to the outside solution (lower water potential) by osmosis. This water los...
  • Strong Acid Solution
    950 words
    Introduction The two types of aqueous solutions in chemistry that are being experimented with are called acids and bases. A strong acid solution is one that consists of a solution that is less than seven ph factor. The basic solution is one that consists of greater than seven on the ph scale. In this experiment standardization of a chemical reaction is used to determine the concentration of the acid and the base solution. Potassium Hydrogen Phthalate (KHP) mixed with Sodium Hydroxide (NaOH) is a...
  • Potato In The 0 4 Molar Solution
    1,422 words
    Introduction. Osmosis is the net movement of water between water molecules from a weaker solution to a stronger solution through a semi-permeable membrane. Structure of a plant cell. What happens when a plat cell is placed in a solution weaker then the solution in a cell? Osmosis takes place. Water diffuses into the cytoplasm and vacuole through the selectively permeable membrane. When this happens the solution in the middle is more concentrated and the vacuole expands while the cytoplasm moves ...
  • Solution Concentration
    324 words
    Plan: The aim of this investigation is to measure the rate of osmosis activity in a potato chip when placed in different solutions. Osmosis is the diffusion of water from a high water potential to a low water potential across a partially permeable membrane. Osmosis continues in this environment until a state of 'equilibrium' is achieved where the water gradient in one are is no different to another. The experiments I conduct will show the rate of osmosis between the potato chip and the solution....
  • Potato Cells Gain Water
    939 words
    Glucose Concentrations On Osmosis Glucose Concentrations On Osmosis Essay, Research Paper Studying the Effect of Various Glucose Concentrations on Osmosis in a Potato Osmosis is the process in which water particles move from an area of high water concentration to an area of low water concentration through a semi-permeable membrane until the concentrations are equal. Osmosis has the same basic theory as diffusion. Particles are moving from an area where they are in great concentration to an area ...

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