For this past week in my science class I have been working on Egg Osmosis with my class. In my lab I had to place an uncracked egg in vinegar to remove its shell and to leave the semi permeable membrane exposed. Then I placed the egg in light corn syrup(a hypertonic solution) then after place it in water ( a hypotonic solution). Then I observed the osmosis of the egg. The egg has been in each solution for twenty four hours and I had to measure its mass in between each solution it gets put into. Some of the procedures that went into this lab were lengthy but it all turns out to show an egg’s osmosis, for the first day we started this lab me and my group had to observe the egg as it was still normal with no change then we had to figure out the …show more content…
My hypothesis was proven in the second day when I took it out of the beaker it was really squishy and mellow unfortunately that's the only thing I thought that would happen. The mass of the egg between these days has gone up and down it has started at 63 and climbed up to 83 in day two this means it massively increased at the cost of the vinegar on day three it dropped to 56 grams and it turned out to be like a deflated beach ball. On the final day the mass of my egg was 96 and it felt like jello it was really dense and it's like it took a lot of water out of that beaker. With my data from my graph there was a pattern that it increased then it decreased and increased again from 63 to 83, 83 to 56, and 56 to 96 grams this means on the graph it made a zigzag pattern in the egg osmosis lab. The volume of the liquid inside each beaker after each day was a starting from 200 mL to 170 mL, 170 mL to 160 mL, and 160 mL to 137 mL. This answers my problem question because it shows my data going up to my final answer of 96 grams and a volume of 137 mL this means it has started off a number and has increased and then decreased to a lower number than that start number then increased to a higher number than that other increase. The independent variable is the solutions, the dependent variable is the mass, the controlled variable is temperature, egg classification, and the time. My hypothesis was proven in a way but not thoroughly made clear through each day which means I kind of got it correct I had it correct when the egg will shed or melt its shell that's really
the replicate shows the same trend as the first experiment. I used a measuring cylinder and a beaker to measure out the amounts of water; however these did not seem to affect the quality of my results. To increase the accuracy of my results I could have perhaps used a burette. Even though I did the best I could to keep the experiment accurate, I did. some places there were mistakes that unintentionally occurred.
The first day we weighed the egg before putting it in a cup of vinegar, the egg weighed 55.47 grams, we left the egg here for approximately forty-eight hours. The second day the egg was still in the vinegar. The third day we moved it into the corn syrup where it stayed until the next morning, the egg weighed 76.66 grams. The fourth day the egg was put into tap water with one drop of food coloring where it weighed 41 grams, the egg stayed here until the following morning. On the last day we cleaned the egg off like the previous times and weighed it which came to 80.33 grams, we then disposed of the egg seeing that there wasn’t anymore use for
Step 3: Q5. The salt that was placed on the egg turned into ‘sweat’ like beads on the egg. Q6. There is a higher water concentration inside the egg, causing the water to travel through the egg to the salt. The salt creates osmotic pressure on the water molecules in the egg.
Osmosis Experiment Planning Aim: The main subject that I will be planning to investigate is the effects of a concentrated sucrose solution on potato cells on the basis of the Osmosis theory. Background knowledge: The plant cell and its structure To understand osmosis in detail I will need to explain the plant cell (which is the cell included in the osmosis experiment) and its cell membrane. Below I have a diagram of a plant cell: [IMAGE] Osmosis is about the movement of particles from a higher concentrated solution to a lower concentrated solution to create an ethical balance via a partially or semi permeable cell membrane. Osmosis in simple terms is the exchange of particles between the cytoplasm inside the cell and the solution outside the cell. What makes this exhange is the partially permable cell membrane.
My hypotheses stated that when an egg is placed in corn syrup or distilled water, osmosis will occur. They also said that when an egg is placed in corn syrup, the osmosis will occur from the water in the egg to the corn syrup while when the egg is placed in water, the osmosis will occur from water outside of the egg into the egg itself. The final part of my hypotheses states that the egg’s mass will decrease when it is placed in corn syrup, but when an egg is placed in water, its mass will increase. My reasoning when constructing my first hypothesis was that the structure of the corn syrup is too thick to travel through the cell membranes of the egg, but the water in the egg will be able to travel through the egg’s membranes and into the corn
The experiment is aimed at giving a better understatement of osmosis process and the different conditions in which osmosis occurs.
Investigate the Osmosis of Potato Cells in Various Salt Solutions. Introduction I have been asked to investigate the effect of changing the concentration of a solution on the movement of water into and out of potato cells. I will be able to change the input of my experiment. The input variable is the concentration of the solution.
Osmosis is the facilitated diffusion of water across the cell membrane of a cell. The inside layer of the cell membrane is hydrophilic, meaning water cannot easily pass through the membrane. The cell membrane has to have aquaporins, which are water channel proteins, that move the water across the membrane. If there is a water and salt solution outside the cell, the salt can enter the cell by diffusion, but the cell membrane is not permeable to the water. Because there is more solute solution inside the cell, there is less water. The aquaporins move the water across the membrane until equilibrium is reached.
- The nurse’s mistake will increase the saltiness due to the double amount of saline in the bag.
Also, the temperature of the bath water should be recorded. For the next 15 minutes, the location of the dye should be recorded. Also, the temperature of the bath water should be recorded every other minute. All the data should be recorded in table one and used for analysis.
The purpose of the series of experiments in the lab was to in part one, see the relationship between surface area, volume, and the rate of diffusion, diffusion is the process of substances crossing the cell membrane). In part two it was to create manmade “cells” to help discover hypotonic (when t...
== = This experiment is based on the concept of Osmosis. Osmosis is the diffusion of water molecules from a region of high water concentration to a low water concentration through a semi permeable membrane (in this case, the cell potato cell membrane). The cell walls of the potato cells are semi permeable meaning that water molecules (which are small) can fit through but other bigger molecules such as glucose cannot pass through. The water molecules can flow both ways through the membrane, letting molecules both in and out.
== § Test tubes X 11 § 0.10 molar dm -3 Copper (II) Sulphate solution § distilled water § egg albumen from 3 eggs. § Syringe X 12 § colorimeter § tripod § 100ml beaker § Bunsen burner § test tube holder § safety glasses § gloves § test tube pen § test tube method = == = =
Osmosis in Potato Tubes Osmosis: Osmosis is the movement of water molecules through a semi-permeable membrane from a high concentration to a low concentration. Diagram: [IMAGE] [IMAGE] Aim: To see the effects of different concentration of sugar solution on Osmosis in potato tubes. Key factor: In the investigation we change the sugar solution from: 0%-10%-20%-30%-40%-50% this is the independent variable; the dependant variable is the change in mass. Prediction: I predict that all the potato tubes in pure water or low concentration sugar solution will swell because water enters their cells by osmosis.
Dependent Variable ------------------ Rate at which the bubbles of oxygen rise, which will be calculated by observing how many bubbles of oxygen rise to the surface of a measuring cylinder (by means of downward displacement) in one minute. This will be measured in bubbles per ten seconds. Control variables: ¨ Volume of substrate used: 100ml ¨ Temperature: taken place at room temperature 21 degrees centigrade ¨ Type of substrate used: Hydrogen peroxide ¨ Mass of meat used: 5g ¨ Amount of water in the test tube in which the oxygen bubbles downward displaces in the water. This is so the time taken for each individual bubble to effectively rise to the bottom of the test tube will take the same amount of time.