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Osmosis Observation Of Cells Lab Report

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Osmosis observation of cells Statement of the problem: • What effects does pure water or 30% sucrose solutions have on a cell after its been soaked for a period of time in a beaker of solution? • This lab is to determine the effect that solution has on a cell. Observing the permeable membrane under different conditions: hypotonic, Isotonic and hypertonic. Results will vary by solution and mass. Hypothesis: • I predict that if the solution with in the cell, is the same as the solution outside the cell, therefore would be any change to the cell’s mass. This would be a result of an isotonic fluid witch has the same salute concentration as the cell. Materials: 1. Dialysis tubing 2. Scissors 3. String 4. Beakers 5. Pure water 6. 30% sucrose 7. Graduated cylinder 8. Mm rulers 9. Electronic balance Procedure: 1. First we started off by dividing into groups of 3, as each person is responsible for setting up a cell and a beaker. 2. Using your mm ruler to measure 10cm of dialysis tubing 3. Using scissors to cut the dialysis tubing and …show more content…

If the solution with in the cell is the same as the solution outside there is no change to the mass. My Isotonic cell stayed the same mass of 6.4. As for the other observations, Hypotonic witch was 30% sucrose solution inside the cell and distilled water in the outside, this cell went up on mass from 7.7g to 8.5g. in contract the hypertonic cell lost mass, this cell was made with distilled water inside the cell and 30% sucrose outside. This was a very fun and active lab assessment that helped me better understand the process of osmosis. Now, I can see how osmosis is used in our daily lives, from fruits to meats, medicine etc… its very interested in fruits because it’s made of 75% water, and this makes them user to spoil. To preserve fruits, it must be dehydrating the same way the use salt on meats. It’s not only about the water going in but coming out and its

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Additionally, it was difficult obtaining a piece of rhubarb that was thin and particularly red, therefore the effect could not be best observed in the cells. Part B: Design your own experiment Parts of this practical were taken and slightly altered from the following link http://www.markedbyteachers.com/gcse/science/investigate-the-effect-of-surface-area-on-osmosis-in-potato-tissue.html Aim: To observe the effect different surface area: volume ratios have on osmosis in potato tissue. Hypothesis: If the potato has a larger surface area: volume ratio, the quicker osmosis will take place and the larger the mass will be at the end of the experiment, therefore the difference in mass of the potatoes from the start of the experiment to the end of the experiment will be larger. Additionally, the potato pieces left in a saltwater solution will decrease in mass, whereas the pieces left in water will increase in mass.

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In this experiment three gummy bears were put in different solutions to observe the effect of osmosis on them. The independent variable in this situation are the following types of water: tap, salt, and sugar. The dependent variable is the change in mass and volume from all three gummy bears. The gummy bear brand, the environment, and the amount of time in the solution are the constants of the experiment. After the experiment is competed, one can determine how the osmosis changes the gummy bears.

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During this experiment we are going to test this hypothesis by putting the egg into vinegar so the shell disintegrates and we get a permeable plasma membrane. After we will place it in two different substances one being corn syrup and the other is water with food coloring. We will observe how osmosis moves water across the plasma membrane during this whole experiment and how passive transport works. We will also observe Hypertonic and Hypotonic environments and how they move water across the plasma membrane going from high to low

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Osmosis Egg Lab Report Introduction The experiment revolves around selective permeability of the membranes of de-shelled chicken eggs. The eggs have been soaked in vinegar for about 3-4 days to dissolve its shells, which results in a delicate shell membrane connecting the inner contents of the egg. The shell is selectively absorbent only to water. The solution that is the dissolved in the internal contents of the egg is approximately 18-20% which is the solute concentration.

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This caused the water to leave the cell to try and reach a state of equilibrium. However on day three, when we submerged the egg in water, the water entered the egg. This was caused by the fact that there was a higher concentration of water outside of the egg than inside of the egg. The data recorded on these two days showed the largest changes in the mass of the egg. Day four was our example of osmosis.

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Although osmosis doesn’t just occur in vegetables; however, by using these substances as a test, it can resemble the how osmosis would work in other situations. For example, osmosis is used when preserving fruits and meats. Likewise, this experiment gives a proper demonstration on how to use osmosis to its full potential. This would help

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This also shows how much water was transferred from the egg to the sugar solution. The higher the percentage of corn syrup was, the faster the rate of osmosis was. As a result, the egg placed in 75% corn syrup, 25% filtered water had the lightest weight (0.5 oz), while the egg placed in 25% corn syrup, 75% filtered water weighed 2 oz. Overall, the importance of this lab was to understand the process of osmosis and how it differs depending on the type of

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It describes how an extracellular solution can change the volume of a cell by affecting osmosis. If the extracellular fluid has higher osmolarity than the cell's cytoplasm, the cell will lose water and shrink (hypertonic solution). If the extracellular fluid has lower osmolarity, water will enter the cell, which may cause it to swell and even burst (hypotonic solution). An isotonic solution has the same osmolarity as the cell, so there is no net movement of water. 4.When is a hypotonic IV solution administered to patients?

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The egg had been acting as the cell in this experiment. Placing the egg in vinegar made it easier to see the effects of osmosis because there was no impermeable shell to prevent liquids or molecules from passing through. As previously stated, water molecules will diffuse from higher concentrated areas of water to lower concentrated areas of water. In the tap water example, there had been a higher concentration of water molecules in the water, not the egg. This means that the water molecules will pass through the cell membrane to enter the egg and reach a state of equilibrium.

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Biology Design Practical Joshua Edwards What are effects of the volume of a potato and the amount of weight it loses when placed in salt solution? Introduction This design practical uses a potato’s surface area to volume ratio to see what affects it has on osmosis in different concentrations. Osmosis is the movement of water molecules through a cell membrane into an area of a higher solute concentration. The movement goes the way of the solvent with more solute because the lower solute concentration is drifting through balancing the ratio of solute per solvent (En.wikipedia.org, 2018).

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An egg naturally has a lot of stuff inside, so the outside solution has to be very concentrated for this to happen. That’s the case when an egg is treated with corn syrup or buried in salt. By contrast, when an egg is treated with distilled water, or a dilute salt solution, the solute concentration is higher inside the egg than out, so the water moves into the egg, increasing its mass. It may be easier to think about osmosis in terms of water concentration rather than solute concentration. If the solute concentration is high, then the water concentration will be low by comparison.

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