How does the concentration of sucrose affect the mass of a potato?
Therefore as the concentration of sucrose increases in each solution, the water in that solution is less able to move to the potato, causing water from the potato to move into the solution, decreasing the potato’s mass. An osmotic system is set up when a semi-permeable membrane is placed between two solutions.
How does concentration affect the rate of osmosis?
By using the same mass of potato slices and putting them in different concentration of solutions for a specific amount of time will tell us how the concentration changes the mass of the potato slice. Therefore changing the rate of osmosis.
What is a GCSE experiment about osmosis?
A GCSE experiment looking at the effects of the concentration of sucrose... ...Experiment to Investigate Osmosis in Potatoes The aim of this experiment is to investigate the movement of water in and out of plant cells. The cells chosen for study will be taken from potato tubers.
What is the osmosis effect on a potato?
This osmosis effect is the flow of water across the semi permeable membrane from a solution of higher water potential (water) to one with a lower water potential (potato). The potato will allow water into it to even out the sugar concentration between the solution and the potato.
How does sucrose concentration affect the rate of osmosis?
This means that as the concentration of sucrose molecules increases in a solution; the concentration of water decreases also the water potential resulting in decreasing of a solution's ability to move between solutions due to osmosis.
How does sugar concentration affect osmosis?
Sugar molecules in the sucrose solution are too large to go through a semi-permeable membrane so water moves out during osmosis. The permeable membrane only allows solvent through it, the solute (sugar molecules) can't go through it.
What does sucrose do in osmosis?
The sucrose solution is hypertonic to the water – it is a more concentrated solution. There is a net movement of water molecules, by osmosis , from the water outside to the sucrose solution inside the Visking tubing. This makes the liquid level in the capillary tube rise.
How does sucrose concentration affect osmosis in a potato?
Effect Of Sucrose Hypothesis On The Concentration Of Osmosis However, if the concentration of the solution in the beaker is less than that of the potato (such as distilled water), then the mass of the potato will increase. So, as the concentration of sucrose increases the rate of osmosis increases.
Why does concentration affect rate of osmosis?
The volume on the side with the solute increases until the number of water molecules on both sides is equal. Increasing the concentration of solute reduces the space available for water molecules, which reduces their numbers. This in turn increases the tendency of the water to flow into that side from the other side.
What affects the rate of osmosis?
Factors Affecting the Rate of Osmosis Difference in Water Potential – The higher the difference in water potential, the faster the osmosis; for the lesser water molecules are in the region of low concentration, more water molecules from the region of higher concentration can enter faster and easier.
What is the relationship of the rate of osmosis with the concentration of sucrose on one side of the membrane concentration gradient of sucrose?
- The greater amount of sucrose concentration in the bag has a positive correlation to the rate of osmosis because as the percentage of sucrose increases so does the rate.
Is 20% sucrose solution hypertonic?
Would the 20% sucrose solution be hypertonic; hypotonic @I isotonic to interal coatent ofthe egg? _ mark) Ans. It will be isotonic solution.
When sucrose is added to pure water it will?
Adding sugar to water will raise the boiling point and decrease the freezing point of water.
What is the effect of sucrose solution on potato?
The potato chip in sucrose solution decreased in mass. This is because of the overall movement of water out of the less concentrated solution in the potato cells and into the more concentrated surrounding solution. Water moves in both directions across the partially-permeable membranes of the potato cells.
What happens when a potato is placed in sucrose?
The potato cylinders placed in strong sucrose solutions will lose mass/length as water will have moved from an area of high concentration (inside the potato cells) to an area of lower concentration (outside the potato cells).
What happens when potato is placed in concentrated sugar solution?
The concentrated sugar solution has a lower concentration of water than the potato has. The potato will shrivel up, as water has passed through as a result of osmosis.
How does sugar affect water potential?
Since on conversion of starch to sugar the solute concentration increases, the water potential decreases.
How does the concentration of salt affect the rate of osmosis?
Salt triggers osmosis by attracting the water and causing it to move toward it, across the membrane. Salt is a solute. When you add water to a solute, it diffuses, spreading out the concentration of salt, creating a solution.
What substance diffuses down its concentration gradient in osmosis?
WaterWater has a concentration gradient in this system. Therefore, water will diffuse down its concentration gradient, crossing the membrane to the side where it is less concentrated. This diffusion of water through the membrane—osmosis—will continue until the concentration gradient of water goes to zero.
Does osmosis go against the concentration gradient?
Key Points. Osmosis occurs according to the concentration gradient of water across the membrane, which is inversely proportional to the concentration of solutes. Osmosis occurs until the concentration gradient of water goes to zero or until the hydrostatic pressure of the water balances the osmotic pressure.
What are the factors that affect osmosis?
Possible factors that effect osmosis are temperature, concentration gradient, water potential and the surface area exposed for osmosis to occur. (1) For this experiment specifically the concentration gradient was changed, however other things might not been fully controlled either. The surface area is a factor not fully controlled. The data collected makes sense though, and clearly supports the hypothesis discussed earlier. To answer the research question (What is the effect of sucrose concentration on the rate of osmosis across a potato cell membrane? the results make it very clear that as the concentration increases so does the potential for osmosis to occur. Reasons behind extreme percentage change could be some of the errors stated before or it could indicate that if the solution was raised even further the rate of osmosis would be even greater.
What is the movement of solvent molecules across a partially permeable membrane?
Osmosis is the movement of solvent molecules across a partially permeable membrane. They move from a region of low concentration (hypotonic) to a region of high concentration (hypertonic). The rate of osmosis across a eukaryotic cell membrane can be affected by different factors; including temperature, concentration gradient, ...
What happens to the cytoplasm of a sweet potato?
If the sweet potato cytoplasm is hypotonic relative to the sucrose solution, then water will move from the potato into the sucrose solution, resulting in a decrease in mass. If the potato cytoplasm is hypertonic relative to the sucrose solution, then water will move from the sucrose solution into the potato, resulting in an increase in mass of the sweet potato.
Is sweet potato osmosis active?
A potato (Solanum Tuberosum) contains 92% water, which is an osmotically active component. The precise osmotic potential of sweet potatoes is however unknown. The osmotic potential of sucrose is know to be at 20 oC, the osmotic potential of sucrose is 2. 436 MPa2. The rate of osmosis will be calculated by measuring the percentage change in mass ...
Is sucrose hypotonic or hypertonic?
Both graphs support that all solutions containing sucrose apart from 0. 2 M are hypotonic, because as stated in the hypothesis when the mass decreases it means the water in the potato is moving out of the membrane into the sucrose trying to equalize both concentrations. For the 0. 2 M however, the mass increased which suggests that the potato is hypertonic relative to solution. Graph 2 shows the different osmotic potential possible for each concentration, even though the mass for is decreasing for all apart from 0. 2 M, both of these are considered osmosis.
How does the type of tissue affect the rate of osmosis?
Type of tissue: the type of tissue has a certain effect on rate of osmosis since the amount of glucose in each type of tissue differs. This will be controlled by using only one type of tissue which is the same potato.
What are the factors that affect osmosis?
Temperature is one of the factors that affect osmosis, due to the existence of more kinetic energy as temperature increases meaning more effective collisions so we start by using temperature to maintain the same set temperature for each investigation performed by using a thermometer to monitor.
What factors affect the osmosis rate of potatoes?
There are many factors that can alter the osmosis rate such as the sizes of the particles and temperature , nonetheless, the factor that might alter the osmosis primarily in this experiment is the concentration of sucrose. Therefore, this laboratory is going to focus exclusively on the effect of the sucrose concentration on the osmosis rate. The higher the amount of sucrose, the higher the mass difference in the potatoes since the sugar is a hypertonic solution, meaning that there is a large amount of particles that will dissolve in the solution while the water, that is a hypotonic solution, will not dissolve as many as a hypertonic solution. When the potatoes are placed in the sucrose solutions where the potential of water is larger than that of the potato, the particles will most likely be drained from the potatoes into the sucrose. Consequently, the potato's weight will diminish.
What would happen if the potato cylinders were put in sucrose concentration?
If the potato cylinders were put in sucrose concentration where the water potential is higher than the water potential that of the potato itself that would cause the mass of the potato to…show more content…
How does osmosis work?
Osmosis regulates solvents through a semipermeable membrane from a less concentrated solution into a more concentrated one , creating equal concentration in and out of the cell. For the purpose of this laboratory a dialysis bag will be used to imitate the semipermeable membrane of a cell. The dialysis bags will be filled with different concentrations of sucrose and placed in distilled water to mimic osmosis. With the dependent variable being the mass of the bag and the independent variable being the sucrose.
How long to measure sucrose in potato cylinders?
Maintaining all variables unchanged such as pH, same size, and a constant temperature. time taken for all potato cylinders will be 30 minutes.
What is the purpose of the osmosis experiment?
The purpose of the experiment was to determine what happened during osmosis and diffusion across membranes by using a fresh hen’s egg. During the first step, the egg was put into the vinegar. The shell of the egg became soft and started to fall off by small pieces. The reason of the vinegar was able to remove the calcium shell was that the acetic acid in the vinegar could react and dissolve the calcium. The formula for this reaction was CaCO3 + CH3COOH –> Ca + H2O + CO2.
How does sucrose affect osmosis?
Effects of Sucrose Concentration on Rate of Diffusion Through Osmosis Introduction: Many human beings undergo dialysis to filter waste from their blood due to the fact that their kidneys are not working properly. The blood is filtered through a selectively permeable membrane which separates waste from the blood, essentially pumping clean blood back into the body. This is a form of osmosis, which by definition, is the net movement of water across a selectively permeable membrane, which was our dialysis
What factors affect the rate of osmosis?
Factors that influence the rate of osmosis are temperature, molecular size, pressure, and concentration gradient . These variables can increase or decrease the rate which osmosis occurs. If a cell takes in too much water through osmosis, it can
How does osmosis work?
Osmosis is the passive movement of water from an area of low solute concentration to an area of high solute concentration, normally across a membrane which prevents the movement of solvent. This is a process by which materials may move into, out of, or within cells. Osmosis doesn’t depend on energy provided by living organisms but is affected by the properties of the cell membrane. The rate of osmosis is dependent on such factors as temperature, pressure, molecular properties such as size and mass, and the concentration gradient. In osmosis, the relationship between a solute’s concentration outside of cell and inside of a cell is described in terms of the tonicity of the solution outside of the cell. A cell is in a hypotonic solution when the solute is more concentrated inside the cell and therefore water moves into the cell. In this solution the cell swells as water enters, this may continue until it ruptures or hemolyzes. In the reverse condition, the cell is in a hypertonic solution
What are the factors that affect the movement of water through osmosis?
It is the process in which fluids pass through a partially-permeable membrane. It is the movement of water from high water concentration to low water concentration. Plant cells react to osmosis by hypertonic, isotonic and hypotonic. Keywords Hypertonic – is when the water outside of the cell is lower than
What is the process of transferring water across the cell membrane?
of lower solute concentration (higher free water concentration) to that of higher solute concentration (lower free water concentration) until the solute concentrations on both sides of the membrane are equal. The diffusion of free water across a selectively permeable membrane, whether artificial or cellular, is called osmosis. The movement of water across cell membranes and the balance of water between the cell and its environment are crucial to organisms. ("Diffusion And Osmosis - Difference And
What is the movement of water molecules across a partially permeable membrane from a high water concentration to a?
Osmosis is the movement of water molecules across a partially permeable membrane from a high water concentration to a low water concentration. Osmosis can be effected different things such as:
What is the process of diffusion of water molecules?
So Osmosis is basically a special kind of diffusion involving water molecules, which occurs when two solutions are separated by a partially permeable membrane. The water diffuses from the weaker solution to the stronger solution. Tiny holes in the membrane allow small water molecules to pass through, but the glucose molecules are too large to pass through the semi- permeable membrane.
What is the purpose of the sucrose experiment?
The purpose of this study is to see the effects of diffusion through a selectively permeable membrane when placed in a sucrose solution. This experiment is a model of how diffusion takes place. The dialysis tubing serves as the permeable membrane with which diffusion will occur. Since cells are so small in size, this experiment poses as a model in which diffusion can be witnessed and recorded. I hypothesize that the more concentrated sucrose solutions will cause a greater amount of osmosis.
Is sucrose a hypertonic solution?
This supports my hypothesis and also shows that sucrose is also a hypertonic solution since it there was more water brought into the solution than outside of it. Bag A had a stronger concentration outside its membrane which caused the sucrose on the outside to draw the water out of the dialysis tubing and into the solution that was in the bowl. Bag D has the greatest weight in the end primarily due to the fact that it also contained the highest percentage of solution within the membrane. Bag B had little change in weight due to the low concentration of sucrose in the bag and in the solution outside the bag. Since Bags C and D had the higher concentrations they pull the majority of the water out of the solution and into their membranes. Had Bag B been placed in the solution that Bag A was in, it would more than likely have the same affect that Bag A had.
Equipments
- To do this investigation I have used different equipment such as potato chips, distilled water, sucrose solution, scalpel, chopping tile, ruler, measuring cylinder, test tube, tube rack, digital scales, filter paper, labels and Petri dish. I have used potato chips, distilled water and sucrose solution to check the rate of osmosis in potato chips when distilled water and different concentr…
Safety
- Wear hand gloves while using solutions as it can cause skin irritant due to a risk of having allergies or sensitive skin. Long hairs should be tied and any long jewellery should be taken off as it might get tangled while working and might get stuck in places and might lead to serious hazard. Do not run while carrying equipment as it can fall and cause serious accident example broken gl…
Hypothesis
- The mass of the potato will decrease as the concentration of sucrose solution increases. This is because I have researched in osmosis and isotonic, hypertonic and hypotonic solution, turgid cell and flaccid cell. And the information I have found direct me to come up with this hypothesis. This is why I predict that potato chips placed in distilled w...
Preliminary Test
- Firstly I did my preliminary test before my main investigation to make sure that my investigation will be accurate and reliable. And also to check if the investigation I am doing works. Method First of all I collected all the equipment that is needed for the investigation. As the surface area of the potato chips varied, therefore I chopped potato chips using scalpel on the chopping tile with sa…
Control
- Different changes The difference in temperature affects the reaction time in different potato chips. This will cause the result to be inaccurate. To control this factor I kept the entire sample in same temperature (room temperature). The remaining of excess liquid in potato. The remaining of excess liquid in potato will affect the mass of potato and the results we get won’t be accurate…
Main Test
- Method First of all I collected all the equipment that is needed for the investigation. As the surface area of the potato chips varied, therefore I chopped potato chips using scalpel on the chopping tile with same size to make the length and surface area same as probable. As the potato chips were stored in the isotonic solution I removed the extra excess liquid from each of the potato ch…
Evaluation
- I believe I have gained enough results as shown on the graph and the tables that concludes the experiment, and to prove my hypothesis. I have obtained a good amount of fairly accurate results from which I was able to draw informative and reliable graphs. I believe I took enough repeat results for the number of concentrations I was using also the time I used was sufficient to prov…
Conclusion
- Therefore I can conclude that my investigation was reliable and accurate because it supported the theory of osmosis and showed that isotonic point of potato chips I used in my potato was around 0.29M which falls under the range that isotonic point of the potato chip is between 0.2M – 0.3M. This concludes that my investigation was accurate and reliable. In conclusion, I can say that the …
Background Information
Method
Apparatus: List
Risk Assessment
Results
Discussion
Conclusion
- Possible factors that effect osmosis are temperature, concentration gradient, water potential and the surface area exposed for osmosis to occur. (1) For this experiment specifically the concentration gradient was changed, however other things might not been fully controlled either. The surface area is a factor not fully controlled. The data collect...
Reference