Introduction:
Osmosis is a natural occurrence constantly happening within the cells of all living things. For osmosis to occur, water molecules must move across a semipermeable membrane from an area of low concentration to an are of high concentration. In order to understand osmosis, people must understand the different types of concentrations that can be present within solution. One of them is an Isotonic solution where the concentration of dissolved particles is equal to that of a cell’s. Another is a hypertonic solution where there is a higher concentration of dissolved particles then inside the cell. And lastly there is a hypotonic solution where there are less dissolved particles than inside the cell. As dissolved particles move to a region of lower concentration, water moves the opposite direction as a result of there being less water in the highly concentrated region. In this experiment, gummy bears were placed in salt water, sugar water, and tap water to find the measure of osmosis between the solution and gummy bear.
Hypothesis:
If the gummy bear is added to the solution, then it will lose its coloring and expand.
Materials:
The materials used during the experiment included three plastic cups, three gummy bears, masking tape, marker, balance, calculator, tray, one plastic spoon, a measurement tray, and a ruler. The three plastic cups were used to hold the tap water, salt water, and sugar water. The masking tape and marker were used to label each cup with the
As the lab introduction explains, osmosis is relatively permeable to water and will follow solutes. By instinct, the water will move from a more diluted solution to more of a concentrated solution. The products of the experiments concluded the physiological significance of osmosis by how cell membranes in the body are semipermeable meaning that only certain molecules can pass through it. When intracellular fluid and extracellular fluid are at equilibrium by non-penetrating and concentrated solutes, no net movement of water goes in and out of the cell. Furthermore, if the ECF changes in osmolality, then depending on the difference between the ECF and ICF will determine whether water moves in or out of the cell. This is important in the cell membrane as small differences in osmolarity correspond to large, rapid change in osmotic pressure, causing cells to gain or lose water. In sum, our body makes critical decisions in what molecules are allowed to penetrate the cell membrane and make sure that our red blood cells don’t cause any problems within the
Osmosis is described in one of three ways when comparing more than one solution. The cell’s external and internal environment helps determine tonicity, which is defined as how the cell reacts to its environment. When the cell’s environment is equal in osmolarity to itself and there is no change, it is considered an isotonic solution. When the environment has a higher osmolarity, shrinkage occurs and it is considered a hypertonic solution. When the environment has a lower osmolarity, swellings occurs and it is considered hypotonic.
In this experiment, we will investigate the effect of solute concentration on osmosis. A semi‐permeable membrane (dialysis tubing) and sucrose will create an osmotic environment similar to that of a cell. Using different concentrations of sucrose (which is unable to cross the membrane) will allow us to examine the net movement of water across the membrane.
Osmosis is a process in which molecules in a solvent pass across a semipermeable membrane into a more concentrated solution from a less concentrated one, attempting to make both sides isotonic or equal to each other. Isotonic can also be described as an equilibrium, where there is no net movement of the molecules. Osmosis is relevant in everyday life whether the general population is aware of it or not. It could be as simple as sitting in the pool too long and getting pruney fingers or as complex as a cholera infection in the intestinal cells that does not allow the intestinal cells
The gummy bear lab is an example of osmosis. It is set up like this: we received two gummy bear of the same color, red. Then, we measured the gummy bears’ volume, 2340 mm3. One was put in a water about 100 ml and the other was put in a ziploc bag to contain the moisture. This is because the gummy bear in the bag is our constant, we don’t want it to change. Another day passed and we collected data. Not surprisingly, the gummy bear in the water almost tripled in size, 6000 mm3. This is because of diffusion. The gummy bear had a higher concentration than the water, a lower concentration. That is why the water molecules movement went inside the bear. Another example, of osmosis is the eggsperiment. The teacher dumped eggs into a vinegar solution
Osmosis is the transfer of water molecules from places where there is a lot of water molecules to places there are not many water molecules. When the cell is selectively permeable it allows certain substances in and out of the cell. There are three terms for the amount of solute in a cell isotonic, hypotonic, and hypertonic. Isotonic means there is a balance of solute inside and outside of the cell. Hypotonic is when there is lower concentration of solute in the cell than the concentration outside of the cell. Hypertonic means there is a more solute in the cell than outside of the cell. The molecules want to reach equilibrium, or balance out the amount of water inside and outside the cell. In this alcohol investigation, the purpose was to
In this lab the act of osmosis will be shown in gummy bears when added in different kinds of liquids. To begin the experiment, there’s a need of understanding of the movement of cells and what happens when substance goes in or leaves a cell. What gives molecules permission to go in and leave a living organism's cell is the cell membrane. The cell membrane is able to choose when to become “spongy” in living organisms. It can also distinguish molecules even though they might be the same size, and this is the difference between a non-living thing and a living organism. Some things that are non-living do allow some substances or molecules to leave and enter them, though it can’t separate some of the molecules.(2)
This was measured against a 0% sucrose concentration to allow a controlled variable to be added to the experiment. It was hypothesized that the diffusion rate of sucrose depends on the amount of substance present, and that an increase in concentration of sucrose will lead to an increase in the rate of diffusion. It was predicted that the diffusion rate of 20% sucrose concentration would have a lower rate of diffusion than the 40% sucrose
Osmosis is the movement of water from a less concentrated solution to a more concentrated solution through a partially permeable membrane. This occurs in situations such as the movement through a cell wall, it allows smaller molecules through but not bigger molecules. The molecules will diffuse until the area where the molecules are reach equilibrium.
In this internal assessment the effect of osmosis in gummy bears placed in sugar, salt and water solutions will be examined.
To start off it would probably be useful to know what osmosis is. It 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, equalizing the concentrations on each side of the membrane. It is important because a function of osmosis is to maintain an ideal concentration of solute in a cell. Osmosis balances the pressure and concentration of solution on both
Osmosis is the movement of water passing through the semipermeable membrane. Osmosis always passes from an area where water has more concentration to an area where water has less concentration. Osmosis has three solutions: a hypotonic solution, a hypertonic solution, and an isotonic solution. A solution that is has more water and few solutes is called a hypertonic solution. A solution that has a high concentration of solute on the outer cell than in the inner cell is called a hypertonic solution. A solution that has the same amount of concentration is called the isotonic solution.
(Marieb 2013) Osmosis, is a special kind of diffusion, is defined as the diffusion of water through a semi-permeable membrane from a higher concentration to that of a lower concentration. The concentration of water is inversely related to the concentration of solutes. If the water can diffuse across the membrane, both water and solutes will move down their concentration gradients through the membrane. (Marieb 2012) There are three terms used to describe the concentrations of solute particles of different solutions: Hypotonic- When compared to another solution of different concentration, the solution contains the lower concentration of solute particles. Water moves across a semi-permeable membrane out of a hypotonic solution. Hypertonic- When compared to another solution of different concentration, the solution that contains the higher concentration of solute particles. Water moves across a semi-permeable membrane into a hypertonic solution. Isotonic-Having the same concentration of solute particles as another solution. There is no net flow of water across the membrane. In animal cells, the movement of water is affected by the relative solute concentration of the plasma membrane. As water moves out of the cell, the cell shrink and if water moves into the cell, the cell swells and may even burst.
Osmosis is the movement of water molecules from high concentration to low concentration through semipermeable membranes, caused by the difference in concentrations on the two sides of a membrane (Rbowen, L.). It occurs in both animals and plants cells. In human bodies, the process of osmosis is primarily found in the kidneys, in the glomerulus. In plants, osmosis is carried out everywhere within the cells of the plant (World Book, 1997). This can be shown by an experiment with potato and glucose/salt solution. The experiment requires putting a piece (or more) of potatoes into glucose or salt solution to see the result of osmosis (a hypertonic type of solution is mostly used as it would give the most prominent visual prove of
(Marieb 2013) Osmosis, is a special kind of diffusion, is defined as the diffusion of water through a semi-permeable membrane from a higher concentration to that of a lower concentration. The concentration of water is inversely related to the concentration of solutes. If the water can diffuse across the membrane, both water and solutes will move down their concentration gradients through the membrane. (Marieb 2012) There are three terms used to describe the concentrations of solute particles of different solutions: Hypotonic- When compared to another solution of different concentration, the solution contains the lower concentration of solute particles. Water moves across a semi-permeable membrane out of a hypotonic solution. Hypertonic- When compared to another solution of different concentration, the solution that contains the higher concentration of solute particles. Water moves across a semi-permeable membrane into a hypertonic solution. Isotonic-Having the same concentration of solute particles as another solution. There is no net flow of water across the membrane. In animal cells, the movement of water is affected by the relative solute concentration of the plasma membrane. As water moves out of the cell, the cell shrink and if water moves into the cell, the cell swells and may even burst.