Preview

osmosis and diffusion

Satisfactory Essays
Open Document
Open Document
291 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
osmosis and diffusion
he mass and length of the potato piece must be kept the same in each experiment primarily because they affect the surface area of the piece, and varying surface area could have a great effect on the rate of osmosis. This is because in an experiment where the potato chip has a large surface area, there is a larger area of partially permeable membrane and therefore more opportunity for water particles to pass through. I will keep the surface area the same by keeping the mass and length of the potato piece the same in each instance, by measuring and cutting it carefully.
I am fairly sure that my results are reliable as they proved my hypothesis but I had two anomalous results. I think this is because as we did the experiment over 3 days, we did not have a chance to use the same potato as I had planned to do. All potatoes do not have the same tissue structure and also concentration of sugar in different potatoes is different. I am sure that excess solution cannot be the reason for anomalous results because I wiped it off before I measure the mass of the potatoes. I believe that another reason for there to be anomalous results is that as I was the only person working on the experiment, some of the experiments stayed in the solution longer than the others.
I believe this can affect the reliability of my results. Lastly I think that if I was provided with better equipment to work with than I could make this experiment more accurate and reliable. Below is a graph to compare the reliability of my results. Below is a graph comparing the results of the two experiments I carried out.
Continue Reading
View Writing Issues

You May Also Find These Documents Helpful

  • Good Essays

    Lab 4 Diffusion and Osmosis
    • 657 Words
    • 3 Pages

    Lab 4 Diffusion and Osmosis

    2. Purpose: The purpose of this lab is to help give visual understanding of diffusion which is a solution of high concentration spontaneously (no energy required) moving to an area of low concentration. Also taking a look at osmosis, which is the movement of chemicals across the cell membrane. Osmosis requires some type of energy to be put in for this to happen. After these experiments we should have a better idea and visualization of how chemicals transfer across the cell membrane.…

    • 657 Words
    • 3 Pages
    Good Essays
    Read More
  • Powerful Essays

    Diffusion and Osmosis
    • 1370 Words
    • 6 Pages

    Diffusion and Osmosis

    Diffusion and osmosis are very important in biological process. Diffusion is the movement of molecules or ions from a region of their high concentration to a region of their low concentration. Osmosis is the diffusion of water molecules across a semipermeable membrane. To gain a better understanding of diffusion and osmosis, we examine multiple experiments to show diffusion and osmosis in animal cell, plant cell and synthetic cell. In our first experiment, we weight a decalcified chicken egg and place 10% NaCl concentration. At every fifteen minutes intervals, we weight the egg and record that the weight decreases. In our second experiment, we use three slices of aquatic plant Elodea and add pond water one leaf, distilled water for the second and 20% NaCl for the third, then observe the cells of each leaf with a compound microscope. Under microscope, chloroplasts (green organelles) in Elodea tend to bound to the cell wall in pond water, spread all over the cell in distilled water, pull away from cell wall in 20% NaCl. In our last experiment, we use a dialysis bag that contains 30% glucose and starch solution then place into a beaker of water and iodine solution. We then remove the bag out of the beaker, and use two test tube which label BAG, BEAKER to perform a Benedict’s test. We place solution in the bag in the BAG tube, and solution in the beaker in the BEAKER tube and add a drop of Benedict’s reagent to each tube, then heat each test tube and observe a color change in each tube. These experiments show that movement of water of chicken egg cell and Elodea cell is “osmosis” and movement of molecules in dialysis bag and beaker is “diffusion”.…

    • 1370 Words
    • 6 Pages
    Powerful Essays
    Read More
  • Good Essays

    Osmosis And Diffusion
    • 942 Words
    • 4 Pages

    Osmosis And Diffusion

    Osmosis is the diffusion of a solvent across a selectively permeable membrane that occurs in response to differences in solute concentrations (Allen and Harper 2014).Osmosis can fall under the category of passive transport which does not require energy. With osmosis being a type of diffusion it is viewed as molecules moving from a high concentration to a low concentration. To further explain if there is a low water concentration, high amounts of solutes will be present. Water will most likely move to areas where the solute concentration is high, which demonstrates why there would be less water concentration.…

    • 942 Words
    • 4 Pages
    Good Essays
    Read More
  • Satisfactory Essays

    Lab Report Potato Osmosis
    • 447 Words
    • 2 Pages

    Lab Report Potato Osmosis

    ②Use a cutter to cut the potato to the similar size. Record the weight of pieces potato.…

    • 447 Words
    • 2 Pages
    Satisfactory Essays
    Read More
  • Good Essays

    Osmosis & Diffusion Review Sheet
    • 768 Words
    • 4 Pages

    Osmosis & Diffusion Review Sheet

    1. The cell membrane regulates and controls what kind of molecules ______ move in & out of the cell.…

    • 768 Words
    • 4 Pages
    Good Essays
    Read More
  • Good Essays

    potato battery
    • 749 Words
    • 3 Pages

    potato battery

    3. Insert a short piece of copper wire into each potato. Put the wire as far as possible from the nail.…

    • 749 Words
    • 3 Pages
    Good Essays
    Read More
  • Satisfactory Essays

    Osmosis and Diffusion
    • 1104 Words
    • 5 Pages

    Osmosis and Diffusion

    Diffusion and Osmosis are processes that deal with the movement of atoms and molecules from a higher concentration to a lower concentration. Osmosis deals specifically with the movement of water across the permeable membrane. Diffusion does not need a membrane and is not specific to any element. Diffusion happens in both short and long distances while osmosis takes place over short distances. Molecules are in a state of equilibrium across a selectively permeable membrane during osmosis. Water is the smallest with 3 atoms, then glucose with 24 atoms, than sucrose with about 48 atoms, and then finally starch.…

    • 1104 Words
    • 5 Pages
    Satisfactory Essays
    Read More
  • Good Essays

    Diffusion, Osmosis, Active Transport
    • 2666 Words
    • 11 Pages

    Diffusion, Osmosis, Active Transport

    The main role of phospholipids is that they can form lipid bilayers. It is an amphipathic molecule. The head which is hydrophilic contains a group of phosphate, a diglyceride and a simple molecule e.g. choline. The tail is hydrophobic and is made up of fatty acids. Phospholipids receive and transmit signals across the cell membrane and act as a store room for energy.…

    • 2666 Words
    • 11 Pages
    Good Essays
    Read More
  • Powerful Essays

    Osmosis and Particles Diffusion
    • 954 Words
    • 5 Pages

    Osmosis and Particles Diffusion

    • Gas exchange for respiration — oxygen from blood to tissue cells, carbon dioxide in…

    • 954 Words
    • 5 Pages
    Powerful Essays
    Read More
  • Satisfactory Essays

    Osmosis
    • 354 Words
    • 2 Pages

    Osmosis

    Osmosis is the spontaneous net movement of solvent molecules through a partially permeable membrane into a region of higher solute concentration, in the direction that tends to equalize the solute concentrations on the two sides. It may also be used to describe a physical process in which any solvent moves, without input of energy, across a semipermeable membrane separating two solutions of different concentrations. Although osmosis does not require input of energy, it does use kinetic energy and can be made to do work.…

    • 354 Words
    • 2 Pages
    Satisfactory Essays
    Read More
  • Good Essays

    Potato Battery
    • 1527 Words
    • 7 Pages

    Potato Battery

    3. Place one brass screw and one zinc nail 1⁄? 2 in. apart in each potato. Use the…

    • 1527 Words
    • 7 Pages
    Good Essays
    Read More
  • Better Essays

    Diffusion and Osmosis Lab
    • 2132 Words
    • 9 Pages

    Diffusion and Osmosis Lab

    In the initial set up of this experiment I had 2 sets of 3 screw-cap test tubes that had each been half-filled with 5% gelatin and 1-mL of the correct dye (either potassium dichromate, aniline blue, or Janus green) in each of the test tubes. I labeled the 3 test tubes of set 1 with which die they contained and marked them “5 ˚C”. Then with the other set I did the same exact thing, except I labeled these test tubes “Room Temperature”. I then placed set 1 of the test tubes in a 5˚ C refrigerator, while I kept set 2 at room temperature for a certain amount of time. I made sure to record the time I began the experiment in my lab manual. To begin, I removed set 1 from the refrigerator and compared the distance the dye had diffused in each of the 3 test tubes with the corresponding test tubes of set 2 that had been kept at room temperature. Next, I held each tube vertically in front of a white sheet of paper, and then used a metric meter to measure how far the dye had diffused from the gelatin’s surface (in millimeters). I then recorded each of these distances in my lab manual. I repeated this step for each of the test tubes in both set 1 and set 2 and recorded my results. Then, using my results, I calculated the rate of diffusion for each dye by using this formula: rate of diffusion = distance/ elapsed time (hours). Each of these calculations was then also recorded in my lab manual. I made sure I noted the time the experiment started, ended, and the total elapsed time in hours in my lab manual as well.…

    • 2132 Words
    • 9 Pages
    Better Essays
    Read More
  • Good Essays

    Osmosis and Diffusion Journal
    • 576 Words
    • 3 Pages

    Osmosis and Diffusion Journal

    In our Mediaphys Lesson I learned that the primary structure of a cell membrane is made up of a double layer of phospholipids molecules. The hydrophilic heads of the phospholipid molecules face outwards towards the water base solutions inside and outside the cell. The membrane is also made up of proteins, carbohydrate molecules, and cholesterol that form gates and pores, cell recognition, and stability. Active transport is used when a cell needs a substance to cross the membrane against its concentration gradient using protein carriers. Examples of active transport are endocytosis, exocytosis, and phagocytosis. Passive transport does not require energy it is powered by the concentration gradient of the molecule. Examples of passive transport are diffusion, facilitated diffusion, filtration, and osmosis.…

    • 576 Words
    • 3 Pages
    Good Essays
    Read More
  • Good Essays

    Osmosis
    • 744 Words
    • 2 Pages

    Osmosis

    The point of this experiment was to observe if the different concentrations of sucrose would change the speed of osmosis. Osmosis is a process of a fluid that will pass through a semipermeable membrane into a solution which most of the time has a higher concentration. Osmosis will be demonstrated throughout the lab. The importance of osmosis in a plant and animal cell there is a cell membrane, which helps liquids and some dissolved solids go in and out of it. CITATION Luc26 \l 1033 (Lucke, 1926) It can select what to bring in and put out. Semipermeable means allowing certain substances to pass through the membrane, and only allowing certain solutes. The affects that are needed to allow osmosis to occur are temperature, concentration, surface area, water potential, pressure, and light and dark. The factors that are present in osmosis that I saw were temperature, because with warm water osmosis occurs faster, concentration occurs because the higher the concentration of the sucrose the faster the rate of osmosis occurs. In the experiment there are 3 other reactions that are present are hypertonic, hypotonic and isotonic. Hypertonic is when the cell loses water, hypotonic is when the cell gains water and isotonic is when the cell does not gain or lose water. I predict that each cell will become heavier and heavier after each weigh in every 10 minutes. The experiment that my lab partners and I did was make 4 cells, each with 4 different solutions of different concentrations and place them in their own individual beakers filled with deionized water at room temperature. Every 10 minutes for 70 minutes we took out each cell, weighed it, and recorded the data. CITATION Ral \l 1033 (Traxler, 1906)Abstract…

    • 744 Words
    • 2 Pages
    Good Essays
    Read More
  • Good Essays

    Osmosis and Diffusion
    • 563 Words
    • 2 Pages

    Osmosis and Diffusion

    During the past few weeks in my Ag Biology class we have been learning about and reviewing both osmosis and diffusion. We did two different labs, one on osmosis; the other on diffusion.…

    • 563 Words
    • 2 Pages
    Good Essays
    Read More

Related Topics