Preview

How Does Osmosis Affect The Osmolarity Point Of Potato Cells

Good Essays
Open Document
Open Document
272 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
How Does Osmosis Affect The Osmolarity Point Of Potato Cells
Exploration

How do increasing sucrose concentrations of 0.0 mol dm3, 0.2 mol dm3, 0.4 mol dm3, 0.6 mol dm3 and 0.8 mol dm3 affect the osmolarity point of potato cells, where it is investigated how osmosis changes the weight of the potato cells, measured by the percentage change between the initial and final mass of the potato?

Independent Variable: Increasing sucrose concentrations

Dependant Variable: Mean percentage change in mass of potato cells

All cells have a protective barrier, one which selectively allows substances to enter and exit the cell. This is known as a cell membrane. Some cells are semi-permeable, which means it only allows certain substances to enter and exit the cells. Osmosis is a process by which molecules of a solvent
Continue Reading
View Writing Issues

You May Also Find These Documents Helpful

  • Better Essays

    Biolab 1208 Lab Report
    • 840 Words
    • 4 Pages

    Biolab 1208 Lab Report

    The purpose of this experiment is to calculate the mass/change in mass of plant tissue, in our case potato tubers. The change in mass of the potato tuber disk determines the osmotic concentration. After soaking the potato tubers in different concentrations of sucrose, then calculating the percent change in mass, we can determine the osmotic concentration. The…

    • 840 Words
    • 4 Pages
    Better Essays
    Read More
  • Satisfactory Essays

    BIOL 1208 Writing Assessment 2
    • 367 Words
    • 2 Pages

    BIOL 1208 Writing Assessment 2

    This exercise involves estimating the osmotic concentration of potato tuber cells by using a change in mass method. The null hypothesis states that there will be no change of mass of the potato disks after they have been incubated in any sucrose solution. This means that the concentration of sucrose that the potatoes are in will no effect the movement of water in or out of the potato cells. However, the alternative hypothesis states that the mass of the potato disks will increase after they have been incubated in a hypertonic solution. The mass of the potato disks will decrease after they have been incubated in a hypertonic solution. After the results have been gathered, appropriate estimations can then be made as to what the osmotic concentrations of the potato tuber cells are. Osmotic concentrations will either be hypertonic, hypotonic or isotonic depending on the results of mass change of the potato tubers.…

    • 367 Words
    • 2 Pages
    Satisfactory Essays
    Read More
  • Powerful Essays

    Osmosis Lab Report
    • 1235 Words
    • 5 Pages

    Osmosis Lab Report

    Osmosis is the of a solvent across a semipermeable membrane from an area of lower solute concentration to an area of higher solute concentration. The water being the solvent can move across the membrane but the salt…

    • 1235 Words
    • 5 Pages
    Powerful Essays
    Read More
  • Better Essays

    Ccea as Biology Coursework: an Investigation to Find the Water Potential of Potato and Carrot Tubers in a Sucrose Solution over a 24 Hour Period
    • 1394 Words
    • 6 Pages

    Ccea as Biology Coursework: an Investigation to Find the Water Potential of Potato and Carrot Tubers in a Sucrose Solution over a 24 Hour Period

    As the concentration of the sucrose solution increases, the average percentage change in mass decreases in the potato tubers and this is the same as in the carrot tubers. At low concentrations of sucrose solutions (0.1 M) the mass of the carrot and potato tubers increases due to water moving into the protoplast of the cell from the sucrose solution by osmosis and at high concentrations of sucrose solutions (0.5 M) the mass of the carrot and potato tubers decreases due to water moving out of the protoplast of the cell to the sucrose solution by osmosis. At certain concentrations (0.18 M of the potato and 0.355 M for the carrot) the potato and carrot tubers don’t change in mass due to the water potential inside the cells equalling the water potential of the sucrose solution. My graph displays a distinct negative correlation; the higher the concentration of sucrose…

    • 1394 Words
    • 6 Pages
    Better Essays
    Read More
  • Better Essays

    Diffusion and Osmosis of Solutes and Water Across a Membrane
    • 2179 Words
    • 9 Pages

    Diffusion and Osmosis of Solutes and Water Across a Membrane

    This experiment gave a visual understanding of osmosis and diffusion. The first experiment proved that solutes would move down a concentration gradient if permeable to the selective membrane. The second experiment proved different solute concentrations affect the movement of water, depending on the solute concentration inside the cell. The purpose of this lab was to look for different solutes that can cross an artificial membrane and to observe the effect of different concentrations of sucrose on the mass of a potato cell. Results for Part One suggested that the molecular weight of albumin and starch was too large to pass through the dialysis tube, but glucose and sodium sulfate molecules were small enough to pass through the dialysis tube. Also, a decrease in water weight occurred due the dialysis tube being placed in a hypertonic solution. Results for Par Two showed the potato cell having a molar concentration of 0.2734, which caused sucrose concentrations above 0.2 M to have a decrease in mass. Inversely, sucrose concentrations below 0.2 M caused an increase in mass.…

    • 2179 Words
    • 9 Pages
    Better Essays
    Read More
  • Satisfactory Essays

    Osmosis Lab Response
    • 310 Words
    • 2 Pages

    Osmosis Lab Response

    As the concentration of a solute in water will, through osmosis, transfer until the concentration is nearly the same both inside the cell, or in this case potato, and outside of the cell, the potato strips both gained and lost mass due to the different concentrations of sugar in water. As expected, the potato strips placed in the concentration of sugar water closest to the concentration of sugar water in a potato had the least amount of change in mass. As the potato strips placed in substance Z and substance A both changed 7%, the concentration of sugar water in a potato must be somewhere in between a concentration of 0.4 and 0.6. One source of error for this lab is that the amount of substance placed into each Dixie cup was not measured and therefore were not consistent. If this lab were repeated, it is suggested that the amount of substance be measured in order to produce more consistent results.…

    • 310 Words
    • 2 Pages
    Satisfactory Essays
    Read More
  • Powerful Essays

    PotatoLabReport
    • 1275 Words
    • 6 Pages

    PotatoLabReport

    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 that the lower the concentration, the higher the potato cores weighed.…

    • 1275 Words
    • 6 Pages
    Powerful Essays
    Read More
  • Powerful Essays

    Potato Osmosis Lab
    • 3353 Words
    • 14 Pages

    Potato Osmosis Lab

    Aim To observe and measure the effect of osmosis on the mass of potato using a starch solution. Introduction In order to measure the effect of osmosis, eighteen pieces of potato were cut and placed in six groups, each group of three pieces cut to weigh as close as possible to one another. For each potato group, a test tube was half filled with a starch solution varying in concentration from 0% (water) to 1%. Hypothesis…

    • 3353 Words
    • 14 Pages
    Powerful Essays
    Read More
  • Good Essays

    vugj
    • 460 Words
    • 2 Pages

    vugj

    Introduction: Osmosis is the diffusion of water from a higher concentration to a lower one through a semi-permeable membrane and occurs in the cells of organisms. It is affected by the addition of solute which would lower the water potential, making water potential and solute concentration inversely related. The concept of osmosis loosely described is that the presence of more solute outside the cell means the presence of less solvent (or water molecules in this case) and vice versa; the goal of osmosis is for the water molecules inside and outside of the cell to be equal, causing equilibrium and a stop to net water movement. The goal for a recent lab was to test whether cubes of potato would gain or lose weight depending on the amount of molar concentration of sucrose they soaked in. Solutions made of different molar concentrations of the solute sucrose were prepared before this lab. Potato cubes were weighed and recorded as the initial mass in the data. Four cubes of potato were placed into 100 mL of each solution and let stand overnight. The cubes were then taken out for the final total mass to be measured and recorded. In this experiment, the potato cubes were the dependent variables, and the molar concentrations were the independent or manipulated variables.…

    • 460 Words
    • 2 Pages
    Good Essays
    Read More
  • Best Essays

    Biology Eei
    • 3499 Words
    • 14 Pages

    Biology Eei

    The aim of this experiment was to test the effect of surface area on osmosis and the effect of solute concentration on osmosis. To test this aim to hypotheses were devised. 1) If potato pieces are immersed in various salt solutions, then the pieces with the greatest surface area to volume ratio will experience the greatest weight change, because more water can move by osmosis across the potato cell’s semi permeable membrane. 2) If potato pieces are immersed in various salt solutions, then the pieces immersed in the most concentrated solution will experience he greatest weight change, because more water must pass across the potato cells semi permeable membrane by osmosis to achieve an equilibrium. The results from testing these hypotheses did not support either and were shown to be flawed because they did not reflect the theories of osmosis relating to surface area to volume ration and salt concentration.…

    • 3499 Words
    • 14 Pages
    Best Essays
    Read More
  • Satisfactory Essays

    Potato Sucrose Lab Report
    • 138 Words
    • 1 Page

    Potato Sucrose Lab Report

    We have learned that there is sugar in potato but this sugar is a glucose polymer, starch. Although there is starch in potatoes, there is not sucrose. Sucrose is a bigger molecule than glucose which means that glucose can pass easily through membranes compared to sucrose. The Yukon Gold potato has three grams of sugars in it. The sucrose solution has a less percent of water than the potato does. So because of osmosis the water in the potato will leave to become equilibrium with the sucrose concentration. If the concentration of sucrose is low in the solution, then the potato’s mass will change less because it has more water than sucrose. When the sucrose concentration is higher, the mass will change more because there will be a lot more water…

    • 138 Words
    • 1 Page
    Satisfactory Essays
    Read More
  • Good Essays

    Potato Osmosis Lab
    • 1094 Words
    • 5 Pages

    Potato Osmosis Lab

    Osmosis was clearly shown since the potato cylinders decreased or increased at different concentrations of sucrose. The results supported my hypothesis because for the 0.0 sucrose concentration the average percent change in mass was 16.9%. For the 0.2 concentration the percent change was 3.59%. For the 0.4 concentration the percent change was -15.3%. For the 0.6 concentration the percent change was -27.1%. For the 0.8 concentration the percent change was -23.2%. For the 1 concentration the percent change was -15.4%. The reason for the change in mass is the process of osmosis. When the sucrose concentration was 0, the cores gained weight because the concentration in the potato cells was different from the concentration outside, which was a hypertonic solution. When the sucrose concentration was 0.2, it was an isotonic solution, so there was no major difference in mass. When the concentrations of sucrose were higher (0.4, 0.6 and 0.8), the outside solution was hypotonic because there was a decrease in the potato…

    • 1094 Words
    • 5 Pages
    Good Essays
    Read More
  • Powerful Essays

    Osmosis: Potato and Blackcurrant Squash
    • 2342 Words
    • 10 Pages

    Osmosis: Potato and Blackcurrant Squash

    In biology, osmosis is defined as the diffusion of solvent molecules (usually water molecules) across a semi-permeable membrane from a region of lower solute concentration to a region of higher solute concentration.…

    • 2342 Words
    • 10 Pages
    Powerful Essays
    Read More
  • Powerful Essays

    Diffusion of Osmosis
    • 786 Words
    • 4 Pages

    Diffusion of Osmosis

    Osmosis is a specialized case of diffusion that involves the passive transport of water. When osmosis occurs water moves through a selectively permeable membrane from a region of its higher concentration to a region of its lower concentration. The membrane selectively allows passage of certain types of molecules while restricting the movement of others.…

    • 786 Words
    • 4 Pages
    Powerful Essays
    Read More
  • Better Essays

    A Level Coursework
    • 1218 Words
    • 5 Pages

    A Level Coursework

    The aim of this investigation was to discover the effect that water concentration had on the mass of potato tissue, and to investigate the movement of osmosis through potato tissue, osmosis being the passage of water molecules from a weaker solution to a stronger solution, though a partially permeable membrane. In this case, the membrane of the potatoes allowed the water molecules to pass through in and out of the solution and the potato, depending on the concentration gradient of the two substances.…

    • 1218 Words
    • 5 Pages
    Better Essays
    Read More

Related Topics