# Osmosis Experiment

Improved Essays
Question:
How does temperature affect the rate of osmosis in raisins?
Background:
Osmosis is the passage of a solvent through a semipermeable membrane from a less concentrated to a more concentrated solution until both solutions are of the same concentration We designed an experiment that would test if a raisins rate of osmosis is affected by the temperature of water it is placed in. The independent variable in this experiment was time which was 10 minute intervals. The dependent variable was the weight of the raisin before and after each interval. And the control was the water temperature each raisin was placed in, which was Hot, room temperature, and cold.

Hypothesis: I predict that the rate of osmosis will be more rapid in the raisins
Second, you will take one of your 3 beakers and label it beaker number 1 room temperature after labeling it you will then fill it with room temperature water. Next you will label your second beaker number 2cold water and fill it with room temperature water and one cup of ice which is approximately 33.1 degrees Fahrenheit. Then you will label your last beaker number 3hot water and fill it with water that you heated on a hot plate to approximately 150 degrees Fahrenheit. After this record each beakers temperature on your chart. Now you will place one raisin in each beaker and set a timer for 10 minutes. After timer goes off you will then take tweezers and remove each raisin from the water, blot it dry, and weigh them. Record the data in your chart. You repeat this every 10 minutes for a total of 30 minutes. So you should have a weight for each raisin at 10 minutes, 20 minutes, and 30 minutes. Then you will analyze your data and record how the weight of each raisin changed over time based on its …show more content…
Depending on the temperature of water each raisin was placed in also affected the raisins texture as well as its weight. Raisins placed in room temp water had a normal texture of a raisin, raisins placed in hot water had the texture of mush, and raisin placed in cold water had the texture of hard.
Our data showed that the rate of osmosis occurred more rapidly in raisins placed in hot water than the other 2 water temperatures. It then occurred a little slower in raisins placed in cold water but osmosis appeared to occur slowest in raisin placed in room temperature water. How do we tell this? By looking at our chart of data we collected and seeing the total weight change from 0 minutes to 30 minutes. Whichever raisin that had the most weight gain after the 30 minutes we concluded had the highest osmosis rate. For us it was the raisin placed in hot

## Related Documents

• Improved Essays

This process showed how each solution affected the egg’s rate and direction. Osmosis is the diffusion of water across a differentially permeable membrane. Moving across a semi-permeable membrane, the water diffuses from a range of high concentration to a range of low concentration. This is made possible by the presence of a concentration gradient. For this experiment, the eggs were examined due to the shifting of the solution across the membrane. Which sucrose solution makes the egg gains the most weight? Lose weight? My hypothesis was that as time increased, the weight in all of the eggs would increase as well. With the eggs being soaked in different solutions, it caused me to conclude that all of the eggs would absorb some…

• 942 Words
• 4 Pages
Improved Essays
• Superior Essays

In addition, a cell’s life depends on cell transport. Osmosis is the diffusion of water, which controls the movement of water in and out of cells. Osmoregulation regulates the water concentration in cells to maintain homeostasis, which is very important for our bodies and living organisms. When cells go through osmosis, their shape will change due to tonicity. Tonicity is the tension in the fluid, which is due to the concentration of dissolved solutes within it. Furthermore, osmosis has three different types of solutions called isotonic, hypertonic, and hypotonic. osmosis has three different types of solutions called isotonic, hypertonic, and hypotonic. An isotonic solution is when the concentration of substances is the same in and out of the cell. Even though it’s the same, the movement of molecules through the membrane still occurs. The amount of water molecules entering the cell is the same as the amount of water molecules leaving the cell. When a cell is placed in this type of solution, it doesn’t change, but stays the same. A hypotonic solution is one in which the concentration of solutes is greater inside the cell outside of it and a hypertonic solution is one where the concentration of solutes is greater outside the cell…

• 1933 Words
• 8 Pages
Superior Essays
• Improved Essays

If the temperature of the water is 38 degrees c, then the growth of the plant will increase. This science fair project is to test whether or not the temperature of the water you water the plant with will affect the growth of the plant. This project is interesting because the way plants grow is an interesting study. In this project i hope to achieve an answer on whether or not a plant’s temperature of water should be a certain temperature to help the growth of the plant.…

• 928 Words
• 4 Pages
Improved Essays
• Great Essays

During our biology lab we learned all about cells, and to further our understanding we even conducted an experiment with an artificial cell. To start the lesson, we learned the difference between diffusion and osmosis, how concentration gradients affect both. Also how the cell membrane works, how tonicity affects plant and animal cells differently, how dialysis tubing works, and how it acts like a living cell. By the end of the lesson we understood that osmosis is a phenomenon that all cells have to deal with (Thorpe, 2015). To better understand how osmosis works we set up an experiment, and recorded our results.…

• 1532 Words
• 7 Pages
Great Essays
• Improved Essays

One’s body is made of 70% of water that in which is the main component of the cells within one’s bodies. Within these cells, there are particles that move inside and outside through a semi-permeable membrane. This process is called diffusion. In diffusion, particles move in motion at a random speed from a high concentration to an area of low concentration until all of the molecules are dispersed evenly. It is important to remember that involvement with diffusion depends on the concentration. The greater the concentration, the greater the rate of diffusion. Also known as the concentration gradient. Another process in which particles enter and leave cells is osmosis which is a kind of diffusion that involves water molecules. This takes place…

• 805 Words
• 4 Pages
Improved Essays
• Improved Essays

Osmosis is the net movement of water towards higher concentration. In osmosis experiment, water likes to diffuse from an area of low-solute concentration to an area of high-solute concentration. The purpose of the osmosis experiment was to observe the diffusion of solutes and the osmosis of water through a semipermeable membrane, which was dialysis tubing. This experiment was done to examine, if the solution is hypertonic, hypotonic or isotonic.…

• 422 Words
• 2 Pages
Improved Essays
• Great Essays

The actual membrane is created up of phospholipids which naturally form a bilayer, these phospholipids have a head that are hydrophilic and two fatty acid tails that are hydrophobic, and this allows water molecules to pass between the phospholipid molecules by osmosis and allowed self-orientating properties. It’s more than just a passive envelope; it is a dynamic structure that is actively involved in cellular activities such as cell signalling, cell-cell recognition and of course hydration. Another process important in cells is active and passive transport, which is the biological process that moves oxygen, water and nutrients into cells and remove its waste products. The difference between them is that active transport requires chemical energy as it is the movement of those chemicals from areas of lower concentration to areas of higher concentration while on the other hand passive transport requires no energy as it is the transportation of biochemical from areas of high concentration to low concentrations. In the report, active transport is the one which will be demonstrated as it is the transportation of low-to-high concentration. Passive transport, more commonly known as osmosis, is a theory which recognises the biological process where water and other molecules move across biological semipermeable membranes into a region of higher solute concentration. Terms which are…

• 1862 Words
• 8 Pages
Great Essays
• Great Essays

Create a hot water bath by heating a 100mL beaker filled with water. Place the test…

• 1251 Words
• 6 Pages
Great Essays
• Improved Essays

The reaction was extremely slow in the cold water as molecules do not move as fast in cold water. Once you increased the temperature you could see the molecules move more vigorously.…

• 903 Words
• 4 Pages
Improved Essays
• Improved Essays

Osmosis is the “diffusion of water across a selectively permeable membrane” (Raven et al. G-16). In this experiment, dialysis tubing was used to mimic the selectively permeable membrane to show what osmosis does when placed in different solutes. We filled dialysis tubes fill with different percentages of solute and placed them in beakers full of a different solute. Through this experiment, I saw what happens when the solution becomes hypertonic, hypotonic, and isotonic. My hypothesis was that bag A would shrink because the water would leave the bag to go to the higher concentration. Bag B would stay the same because it would be isotonic. Bag C and D would swell because water would rush into the cell where…

• 732 Words
• 3 Pages
Improved Essays
• Decent Essays

For this experiment, 100 ml of orange juice, and 100ml of water were measured out. The temperatures of the liquids were the same. Next, the ph levels of both liquids were measured. One Alka seltzer was dropped in the water and one in the juice, and timed how long it took to dissolve. The ph levels of the water and juice were measured after the alka seltzer dissolved. The experiment was repeated two times.…

• 426 Words
• 2 Pages
Decent Essays
• Improved Essays

Cells are the building block of life. But these cells aren’t a closed system. There is a constant movement of various molecules in and out of the cell that brings nutrients in and brings waste out. This movement of particles in and out of cells is based around osmosis. It is written in the Lab Manual (2014) “Osmosis is diffusion of water across a differentially permeable membrane” (p. 97). In this experiment, dialysis tubing, a type of differentially permeable membrane which only lets water molecules through, was used to create bags used to model cells. Four bags were made and labeled “A,” “B,” “C,” and “D.” The bags were filled with sucrose solutions of 1%, 1%, 10%, and 25% respectively, then A was placed in a 10%…

• 1281 Words
• 6 Pages
Improved Essays
• Decent Essays

Research Question: How does changing the concentration of sugar (sucrose) affect osmosis in containers of potatoes?…

• 184 Words
• 1 Pages
Decent Essays
• Improved Essays

The procedure for Lab 5 contained four parts. For Part A, a clean, dry 100 mL beaker was obtained and filled with 60 mL of distilled water. Next, the beaker was placed on a ring stand with a thermometer attached to the ring stand to record the temperature of the water. After the thermometer had been in the water for two minutes, the temperature was recorded. Following the recording of the temperature, a 10 mL pipet and a bulb was used to pipet 10.00 mL of distilled water into a clean, dry, pre-weighted 50 mL beaker. The mass of the water was recorded. Next, the volume of the water dispensed was calculated…

• 524 Words
• 3 Pages
Improved Essays
• Improved Essays

In this experiment each group received 2 chicken eggs whose shells have been dissolved off. This gave us a differentially permeable membrane so that we can observe osmosis and what happens when the membrane is presented with different solutions. Since we did not know the concentration of the egg, we had to assume that it equaled the concentration of the membrane. We then had the ability to determine the concentration based off the assumption and the rate of osmosis.…

• 1466 Words
• 6 Pages
Improved Essays