Osmosis Egg Lab Report

This is also known as a hypertonic solution which explains why the egg will decrease in size. Corn syrup is a hypertonic liquid because it is very concentrated with not much water compared to the egg unlike water which is hypotonic because it contains more water than the egg. In this solution, the solute remains the egg, and the solvent is changed to corn syrup. Osmosis still plays an action because water is still passing through the membrane from high to low concentrations.

The eggs will change in mass in all the three solutions, indicating that osmosis will occur when the concentration of two solutions separated by a semipermeable membrane is different, so that equilibrium is established.

Purpose: The purpose of this lab is to familiarize you with osmosis and, specifically, what happens to cells when they are exposed to solutions of differing tonicities.

The main focus of this lab was to measure different tonicities. Tonicity is the concentration of the solute particle mixed with the solvent inside the cell versus said the concentration of solute and solvent outside the cell (Mader 50). There are three different types of tonicity measurements. One type of tonicity is called isotonic. This means that the solution has an equal concentration of solute and solvent both outside and inside the cell (Mader 50). This means that the concentration is in an equilibrium. The second tonicity is called hypertonic. This type of solution has less free water outside of the cell and a higher concentration of the solute particle. Water exits the cell in order to balance the concentration inside and outside the

The hypothesis states that if the solution is hypotonic the results will decrease, if the solution is hypertonic the results will increase and if the solution is isotonic the solution will vary and or remain constant. In order to test the predictions of the hypotonic, hypertonic, and isotonic hypothesis for the solution  made during the study,  four samples of sucrose were taken and placed into two different beakers each containing a different concentration. Then dialysis tubing A was placed into beaker 1 with B, C, and D placed into beaker 2 for 45 minutes and weighted at 15 minute intervals. My finding in the study was that each of the four samples changed from their initial weight and for the most part accurately proved the hypothesis.

The purpose to this experiment was to study the effect of osmosis in de-shelled chicken eggs in different percentages of sucrose solutions. Osmosis is the process, in which, water moves across a differentially permeable membrane. The eggs were soaked in vinegar to remove the outside hard shell but still leave the egg in its membrane. By placing the six de-shelled in different sucrose solutions, we tested the rate of osmosis. The eggs were placed in the solutions for an hour and weighed in fifteen minute intervals. Then, each weight was recorded and graphed. The results showed that the egg in the water solution gained the most weigh and the only other egg that gained a little weight was the one in the 10% solution. All the other eggs in the different solutions lost weight, even the unknown solution. According to the results the egg that was in the distilled water solution gained weight because it is the hypertonic solution. All the other eggs lost weight because they were placed in hypotonic solutions with different concentrations of sucrose. The egg that was placed in the higher concentration of sucrose lost the most weight. So, the higher the concentration of sucrose, the more water the egg lost.

An egg has a semi-permeable membrane, thus processes like osmosis could occur. Osmosis is the movement of water molecules from an area of higher water concentration to an area of a lower water concentration. Osmosis is important, especially for living organisms, as they help distribute nutrients in the body. An egg’s mass would change when it is soaked in different substances. The goal of this experiment was to investigate how an egg changes through osmosis. This experiment was done to show how substances affect the mass of an egg. To start off, an egg’s mass was measured by putting the egg in a beaker then placing it on a mass scale. The beaker was then filled with vinegar and left alone for twenty-four hours. After a day, the egg was taken

This is the final step of the experiment. The shell-less egg was now placed into a new cup, but very carefully, as the egg was more fragile than when it was soaked in vinegar. The egg in the new cup was then covered with water. The egg sat in the water for a 24 hour time period once again. During this 24 hour time period the eggs appearance and size were once again recorded. After the time period had completed, the egg was removed from the water and was very carefully patted dry. Since the egg was now swollen, extra care was needed when holding the egg. The swollen egg was placed on the scale on last time and its mass was recorded as M3.

I think due to the process of osmosis, the egg will slowly grow in size, soaking in water.

Our independent variable is the mass of the egg after being submerged into a sodium chloride solution. The egg began to increase in size due to the passing of the concentration gradients equilibrium. This is displayed in the results table using the average results. As the results table 1. And the graph above it shows, the hypothesis was proven correct with minor problems when compared to results in table 2. This showed there was dramatic differences in the data collected and this could be due to multiple factors. It was concluded that between two and five percent sodium chloride in 100mL water that the egg and the concentration reached an equal zero concentration

In conclusion, the data that was collected helped tell us that the solutions greatly affected the cell of the egg because it caused the egg’s mass to increase than decrease. Also saw how the solutions played a role in the phospholipid bilayer and saw how it altered the shape of the egg. However, it does not support my hypothesis on the affect the egg would undergo onced placed in sugar and water but sugar was not used in this experiment, but water was used and it didn’t affect the shape of the egg, all it did was cause the egg to be in a isotonic state. According to Khan Academy (2017), states that a cell is isotonic “When the extracellular fluid has the same osmolarity as the cell, there will be no net movement in or out of the cell”. Which

When the 4 eggs were weighed it was found that out of the 4 solutions, 2 were hypotonic and 2 were hypertonic. The mass of 2 of the eggs increased and the other 2 decreased after 60 minutes in the various solutions. Out of the 4, the most hypotonic solution was the distilled water; and the most hypertonic solution was the solution with 2.0M glucose. The

Osmosis is diffusion of water across a selectively permeable membrane. The net movement of water through the membrane goes from an area of high concentration to an area of low concentration until equilibrium is found. When a cell is placed in an isotonic environment, equal solute concentration, there will have no net movement of water. A hypertonic environment will have a greater solute concentration, where the cell will have a lower solute concentration. A hypotonic environment will have a lower solute concentration and the cell will have a higher solute concentration. A small lab experiment was done, with the purpose of finding the solute concentration, inside decalcified eggs. The experiment was done using four decalcified

Decalcified egg was prepared by, soaking regular in vinegar for 24 hours to decalcify the shell leaving a permeable membrane. Each of group of students will obtain 4 decalcified eggs, and place them in 4 different solutions, water, 0.5M glucose, 1.5M glucose, and 2.0M glucose. The students’ job now is to observe the eggs over 75 minutes, also take their weight at each 15 minutes. The purpose of taking weight of the eggs is to determine whether the water flow in or out of the egg. the glucose content of the egg can be determined based on the change in its mass. If the mass of the egg increases, which indicates water flows into the egg, the egg must be hypertonic to the hypotonic extracellular fluid. If the mass of the egg decreases, which indicates the water flows out of the egg, the egg must be hypotonic relatively to hypertonic extracellular fluid. If there is no change in mass, which indicates that the egg is in isotonic solution, so the glucose content of the extracellular fluid must be equal to the glucose content inside the

If the solution contains only sucrose then the osmotic pressure will increase substantially. This would represent a hypotonic solution because more water molecules are entering the cell meaning the solution contains no invertase. If the osmotic pressure has a slight increase than the solution contains sucrose and invertase due to the rate of the sucrose being broken down, however the cell will overtime begin to shrink. If the osmotic pressure remains close to the same than the solution contains no sucrose, containing only water and invertase. We predicted that because the height of the fluid in the osmometer tubing was increasing only a little bit our blue solution was hypertonic and contained invertase and sucrose. The invertase was able to break down sucrose into glucose and fructose which were small enough to be able to leave the cell membrane. This would reflect a hypertonic solution. We predicted this would cause the cell to shrink in size and the height of the fluid would never increase.