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Copy of Copy of Lab Report: Egg Surviving Osmosis
Transcript of Copy of Copy of Lab Report: Egg Surviving Osmosis
A Lab Report By:
Cathleen, Amanda, and Lindsay Conclusion Safety First! Always remember to wear
safety googles and an apron! Saying Goodbye
to Our Little Friend Also remember to wash your hands after handling the raw egg. Meet Yolko. This is our experiment egg. Even though he was just a little boy, he experienced lots of weights and circumfrences due to osmosis.
Hypotheses Procedures Data Results Osmosis is the movement of water through a permeable membrane and is a vital life process, without it we would die. In this experiment, we want to discover the effects of osmosis. We also know osmosis also helps maintain tugor pressure. Tugor pressure is the pressure of a cell's contents against the cell membrane determined by the amount of water. When a substance is isotonic, there is an equal concentration of solutes and solvents. When a substance is hypotonic, there is a low concentration. And when a substance is hypertonic, the concentration is high. THE END
Introduction Materials 1 Beaker—600 mL
1 Plastic Cup---500 mL
400 mL of White Vinegar
400 mL of Corn Syrup
Graduated Cylinder---500 mL
Raw Egg in Shell
String or Yarn
Triple Beam Balance with Weigh Boats
Clorox® Wipes Vinegar- If an egg is placed in vinegar, then the mass of the egg will increase because the shell will soften.
Syrup- If the egg is placed in syrup, then the mass will restore to normal because the syrup is thick and it will push the particles together.
Water- If water is added, then the mass will stay the same because water doesn’t have a high concentration of particles.
In this experiment we want to know, "What effect does osmosis have on an egg when you add vinegar, syrup, and water?"
CLEAN UP! Day 2 Day 4 Day 3 Day 1:
1)Look at the raw egg, and study the appearance of the eggshell.
2)Take measurements of its mass and circumference. Record your information in a data table.
3)Use a graduated cylinder to measure 400mL of vinegar. Pour the vinegar into your cup.
4)Place the raw egg into the cup with vinegar. It should be covered.
5) Leave the egg undisturbed for 24 hours.
6)Hypothesize what you think will happen to the size/appearance of the egg after 24hrs.
After we let our egg soak in vinegar for a day, it grew in size. This step showed that is was hypotonic, because the vinegar went into the egg. This is the reason why it grew.
During the corn syrup test, the egg showed a dramatic change in size after soaking for a day. The egg shrunk, even smaller than the initial egg size. This step showed it was hypertonic because the liquid inside the egg came out into the sugar solution, making it smaller.
After we let our egg sit in tap water for a day, the egg's width and circumference were just about at normal size. We also noticed that the egg got a harder shell.
1)CAREFULLY remove your egg from vinegar and place in the weigh boat tray.
2)Pour the vinegar down the sink and clean out your cup with soap and water.
3)Re-label the cup SYRUP.
4)Observe the appearance of the egg and record observations in a data table.
5)Using a triple beam balance, measure the mass of the egg in grams. Record this number.
6)Using a piece of string and a ruler to measure the circumference of the egg. Record this number in your data table.
7)Measure 400mL of syrup solution (A 50% corn syrup and 50% water) with a graduated cylinder and add it to the beaker.
8)Clean out the graduated cylinder with soap and water.
9)Add 400 mL of water to the beaker.
10)Stir well with a stirring rod.
11)Pour the solution in the beaker into the cup.
12)Carefully place your egg in the cup and allow it to sit for 24 hours.
13)Hypothesize what you think will happen to the size of the egg.
1)Carefully remove the egg from the cup and place it in the weigh boat tray.
2)Pour the liquid down sink and clean out beaker with soap and water.
3) Observe the appearance of the egg and record observations in a data table as after egg was placed in syrup.
4)Measure the mass of the egg in grams. Record this number in a data table.
4)Using a piece of string and a ruler, measure the circumference of the egg. Record this number in a data table.
5)Measure 400mL of water with a graduated cylinder.
6)Add it to your cup.
7)Carefully place your egg in the cup and allow it to sit for 24 hours.
7)Hypothesize what you think will happen to the size of the egg and record in a data table.
1)Carefully remove the egg from the water and place it in the tray.
2)Pour the water down the sink.
2)Using a triple beam balance, measure the mass of the egg in grams. Record this number.
3)Using a piece of string and a ruler measure the circumference of the egg. Record this number.
4)Dispose of the egg.
Color Changed Jelly-Like Shell Desinigrated Size Decreased Almost Clear Squishy Shell Not Full Less Squishy Less Clear Mass and circumference is a little above initial egg size Evidence of Hard Shell Completely Gone Looks Larger Day 1 Round White Hard-Shell Smooth Yolk Visible R I P Variables DATA OBSERVATIONS Teacher ?s Before starting this experiment, we knew that osmosis is the movement of water across a permeable membrane. Osmosis helps regulate the level of concentration in cells by making them isotonic (equal concentration). The question investigated in this experiment was, "What effect will vinegar, corn syrup, and tap water have on an egg's osmosis?" When we put the egg in vinegar, it was hypothesized that if an egg is placed in vinegar, then the mass of the egg will increase because the egg will soften. When we put the egg in syrup, it was hypothesized that if the egg is placed in syrup, then the mass will restore to normal because the syrup is thick and it will push the particles together. When we put the egg in water it was hypothesized that if water is added, then the mass will stay the same because water doesn’t have a high concentration of particles. The results of this experiment proved that our hypothesis when we put the egg in vinegar was correct. This is because the egg grew. Our hypothesis when we put the egg in syrup was incorrect. We said that the egg would return to normal, but it got even smaller. Our hypothesis when we put the egg in water was incorrect, because we said that the size wouldn't change, but it actually returned to about the size that it started at. The purpose of this experiment was to see what effect water, syrup, and vinegar have on the osmosis of an egg. The data in the chart suggests that vinegar is a hypotonic solution because the water moved into the egg, making it larger. And finally, the data suggests that syrup is a hypertonic solution because water moved out of the egg. The data in the chart for the tap water part of the lab suggests that the water is a hypotonic solution because water moved into the egg. The results may not be valid because we left the egg in the syrup solution over the weekend. It sat in the vinegar for 4 days. When performing this experiment again, it will be important to make sure we only leave the egg in the solutions for twenty-four hours each. The results are related to the chapter because we are currently learning about osmosis, diffusion, and the many parts of a cell. The results are related to real life because osmosis affects how much you should water your plants. If they aren't in an isotonic solution, they will wilt. Osmosis is the movement of water molecules through a cell's membrane. Osmosis provides the primary means, by which water is transported in and out of a cell. There are three main types; Hypotonic, Hypertonic, and Isotonic. Hypotonic means that there is a high consentration of water in the solute. Hypertonic is when the consentration of water is lower in the solute. Isotonic is when the consentration of water is even in the solute and solvent. Independent Variable:
The type of solution the egg is stored in
the Weight and Circumference of the Egg