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Egg Osmosis Lab

Mrs. Barkes, Period 1, Emily, Christina, Yanai, Kelly, Makayla

Emily Yarnall

on 5 October 2012

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Transcript of Egg Osmosis Lab

OSMOSIS EGG LAB PROBLEM: How can we observe osmosis across a
semi-permeable membrane? PICTURES: HYPOTHESIS: MATERIALS: BACKGROUND: Analysis questions
1. The independent variable is the substance that the egg was put in. The dependent variable is the size the egg either grew or shrunk.
2. The control was the egg in vinegar water. This is the control because there was no change in the environment of the egg.
3. The egg swelled in the low concentration (pure water) because water rushed into the cell due to osmosis caused by the concentration solute inside the call being higher than the concentration outside the cell.
4. It shrunk in the high concentration (syrup-water) because water rushed out of the cell due to osmosis caused by the concentration of solute outside the cell being higher than the concentration inside the cell.
5. Yes it supported the hypothesis because it was predicted that If we put it in syrup then it will shrink and of we put it in water it will grow.
6.Osmosis is the process in which water moves from a higher concentration to a lower concentration. it is a type of Passive transport.The water moves from high concentration to low concentration.on of solute. The solute does not move in most situations, osmosis is strictly the water movement to create equilibrium.
7. Active transport is the movement of solutes against concentration gradient or electrical gradient. The solutes pass from a low solute concentration to a higher solute concentration. Passive transport is the movement of solutes towards the concentration gradient or electrical gradient. The solutes pass from a high solute concentration to a low solute concentration. The difference between passive and active transport is passive requires no energy and active requires energy. An example of passive transport is osmosis and an a example of active transport is exocytosis. By Emily Yarnall Christina Roberts Yanai Green Makayla Downs & Kelly Gardner
- 1 Chicken Egg
- 3 Cups
- Vinegar
- Corn Syrup
- Tap Water
- Piece of String
- 1 Ruler
- A Scale 5. Wait twenty-four hours and remove your egg
6. Record any data, measure the length, width, and mass and record how
it feels and what it looks like.
7. Get your next cup and fill it 3/4's of the way to the top with your
corn syrup, your done with the cup with vinegar in it.
8. Place the same egg that you've been using into the cup with the corn syrup 9. Wait twenty-four hours and remove your egg
10. Record any data, measure the length, mass, and width and record
your qualitative and quantitative data.
11. Take your last cup and fill it with tap water, 3/4's of the way to the top
12. Take your egg and place it into the cup of tap water
13. Wait twenty-four hours and take out your egg PROCEDURE: 14. Now record all your data, length, width, mass, qualitative, and
15. Now you are done with your experiment and have all your data. Now you may graph all of your DATA. 1. First get all of your materials out and set up your area
2. Take one of your cups and fill it up 3/4's of the way up with vinegar
3. Weigh your egg on your scale
4. Place your egg in the vinegar (cc) image by nuonsolarteam on Flickr If we put an egg in syrup after it has been put into vinegar, then it will decrease in size because of the egg’s concentration outside of the egg.
If we put an egg into regular water (H20) after being put into syrup water after twenty-four hours, then its mass will increase because of the concentration solute. Hypertonic solution is when cell are put into a highly concentrated solution and will result in the water molecules will scatter out the cell. Later on, the cell will shrivel and shrink. Hypotonic solution is when a cell is put into a low concentration solution compared to normal cells. Since the cells are exposed to the hypotonic solution, there’s a net water movement into the cell and cells without walls swell and burst if extra water is not removed. That extra water is from turgor pressure. Isotonic solution is an equal amount of dissolved solute in it compared to the things around it. The amount of water that is moved into the cell is equivalent to the amount of water that is moved out of the cell. The solute concentration inside the cell is equal to the solution outside of the cell. Osmosis is the passage of water from an area of high water concentration through a semi-permeable membrane to an area of low water concentration. There’s water molecules that are polar easily go through the cell membrane because of its size. For cells to maintain homeostasis and endure, the concentration of ions needs to be equivalent on both sides of the cell membrane. On the negative side, if there are additional ions in the membrane and are not removed, then water will travel inside. The water hurries into the cells, it expands, and the cell burst. The hypothesis was correct because it was predicted that putting the egg in syrup would make the egg shrink. And if put in water the egg would expand. When the egg was put in the sugar environment its mass before was 85.7g, then when it was left in the sugar environment, its ending mass was 61g. The egg that was put in the pure H2O environments starting mass was 61g the ending mass was 86g. This proves the hypothesis we predicted. The egg did swell in the H2O environment and shrunk in the sugar environment. The egg that was the control (the vinegar soaked egg) never changed its mass. In the end this proves that the concentration outside the egg effected the mass and how the environment it was set in effected it. Osmosis was a major effect in these variables. Purchon, Nigel D. "Osmosis." Osmosis- Gondar Design Biology. WordPress, n.d. Web. 30 Sept. 2012. <http://purchon.com/wordpress/biology/?page_id=173>.
O'Loughlin, McKinley. "Animation: How Osmosis Works." Human Anatomy. N.p., 2006. Web. 1 Oct. 2012. <http://highered.mcgraw-hill.com/novella/MixQuizProcessingServlet>.
Rader, . "Passive Transport - Taking The Easy Road." Biology4Kids.com | Cell Function | Passive Transport. Andrew Rader Studios, 2010. Web. 30 Sept. 2012. <http://www.biology4kids.com/files/cell2_passivetran.html>.
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