This website uses cookies to ensure you have the best experience. Learn more

Finding The Concentration Of A Potato Cell.

3783 words - 15 pages

AimThe aim is to find the concentration (mole/dm3 (M)) of solute in a potato cell by using the process of osmosis and different concentrations of sucrose solution.Background informationOsmosis is diffusion of water across a partially permeable membrane. It moves from a solution with less solute concentration (high water potential) to a solution with more solute concentration (low water potential). The one with a high water concentration is called a hypotonic solution and the low water concentration is called hypertonic solution, but these only depend on what type of concentration is on the other side of the partially permeable membrane. When more water passes through to one side of the membrane it is called net movement.(Toole + Toole "Essential AS level Biology")This is an example of the net movement through a partially permeable membrane. The right side is the more dilute solution, which makes it the hypotonic solution. The left side is the less dilute solution, which makes it the hypertonic solution. Net movement occurs through the more dilute to the less dilute so it goes from left to right though the partially permeable membrane. As you can see, the dotted line going horizontally through the middle of the two levels of solution shows the level of the solutions at the beginning when the two sides where given equal amounts of its solution. The horizontal solid lines show the level of the two sides after it was left for 2 hours. The right side has more solution in it because of the greater net movement of water going to the right from the left side by the process of osmosis.(Marveen "GCSE Biology")This diagram is of two liquids separated by a partially permeable membrane. The left side has large molecules of solute that has dissolved (hydrated), therefore attracting other water molecules to it and reducing the water potential; it is called the hypertonic solution. On the right side there is less solute to attract the water molecules to it and so it has a higher water potential with more free water molecules; it is called a hypotonic solution. The net movement only starts when the solute attracts the water to it and dissolves into it because this lessens the amount of free water molecules in the solution and so movement of water can occur. The amount of water molecules moving into the right solution is less than the movement to the left so the most significant net movement is to the left. Levels of the water in the two sides increase or decrease respectively when the process starts. When both solutions are equal in concentration, however, the two solutions are called isotonic and no net movement occurs. This theory of osmosis is what we have to use to find the concentration of solute in the potato. I can use this because cells become turgid if water flows into them or flaccid if water flows out of them, and so I can measure the change in their mass as the water moves though the cell's partially permeable membrane. This is because of the...

Find Another Essay On Finding the concentration of a Potato cell.

Determinations of the Protein Concentration of a Cell Extract Using the 'Bradford Method'

683 words - 3 pages DETERMINATIONS OF THE PROTEIN CONCENTRATION OF A CELL EXTRACT USING THE 'BRADFORD METHOD'.CBDP21LFS0028PRACTICAL GROUP E14TH OCTOBER 2008ABSTRACTThe aim of the experiment is to find out the concentration of cell extracts (Bovine Serum Albumin, BSA) using the Bradford method. Stock solution of BSA was made by diluting the protein solution to prepare concentrations ranging from 0.0mg/cm3 to 1.0mg/cm3 (Peck, 1998). 5cm3 of the Bradford dye reagent

"Experiment to investigate the effect of osmosis in potatoes" A GCSE experiment looking at the effects of the concentration of sucrose solution on osmosis in potato tubers

2796 words - 11 pages below:ChipSolution1Water21.0 molar32.0 molarChip numberOriginal lengthResultant length125mm29mm225mm24mm325mm20mmThese results show that a potato chip placed in water will gain in length, a weak sugar solution will lose length and a strong sugar solution will lose length also. The results from this test will allow me to choose an appropriate range of moralities in order to find out what the concentration is inside the cell vacuole. I am going to investigate 0.0

Investigating the Effects of Sucrose Concentration on Osmosis in Potato Tissue

2405 words - 10 pages Investigating the Effects of Sucrose Concentration on Osmosis in Potato Tissue PLANNING ======== We have been asked to research the effects of sucrose concentration on osmosis in potato tissue. Osmosis is the spontaneous movement of a solvent (-in this case water) from a place where its chemical potential is higher to another place where it is lower, through a semi-permeable membrane (-such as a cell membrane

Establishing the concentration of a limewater solution

1329 words - 5 pages PlanThe aim of this experiment is to find the concentration of a sample of limewater solution in g dm?3. I am required to design my own experiment and choose a range of appropriate equipment and apparatus. The indicator will be supplied to me. I am provided with 250 cm3 of limewater, which has been made such that it contains approximately 1g dm?3 of calcium hydroxide. Also available is hydrochloric acid which has a concentration of 2.00 mol dm?3

Determining the concentration of a limewater solution

3083 words - 12 pages AimThis experiment aims to determine the effect an increasing temperature has on a typical plant cell structure.IntroductionCells are surrounded by thin membranes (approximately 5 nm) that separate inside from out, life from non-life. These cell membranes perform many functions:·Barrier: membranes keep the contents of the cell together, allowing nutrients to pass in but keeping out many harmful substances.·Signalling: membranes

An investiagtion to establish the isotonic point of potato cell sap

1090 words - 4 pages I have been asked to investigate the effects of osmosis on potato cell sap. I will test potato cylinders in different strengths of sucrose solution and record any results in a table. I will then analyse my findings and work out the isotonic point of the potato cell sap.PredictionI have looked at my scientific knowledge from the background theory I carried out and I will base my prediction upon this information. In this experiment, I expect the

Finding a Cure: Stem Cell Research

1507 words - 6 pages you can get stem cells from embryonic cells; this is where people get the wrong idea from. Five to eighteen days after conception is the stage of the blastocyst, this is where the stem cells are the richest. People who are against abortion are targeting stem cell reach, because they believe that the first few days is when a baby is a baby, and since people have donated their aborted babies to this reach, they have gone wild over it (Stem). Is a

Investigating the concentration of Glucose inside Cell sap in potatoes Through Osmosis

1813 words - 7 pages width for each piece. I will be finding out the concentration of glucose inside the cell sap by controlling the same amounts of different glucose solution of a different concentration. I will be weighing the mass of the potato before and after placing it in the glucose solution, and measuring the amount of weight gained, or lost, once soaked for exactly ten minutes.EquipmentStopwatchCork BorerRulerElectronic Weighing ScalesMeasuring BeakerPetre

Water Potential of a Potato

1516 words - 6 pages concentration here is no net movement of water which will be between these to values. The concentrations of solutions I plan to use are; 0.3M, 0.45M and 0.6M. I am also planning to place the potato in 30cm3 of sucrose solution.In my preliminary experiment we left the potato tubes in the solution for 48 hours. I plan to do the same. This is because after a while there will be no net movement of water, as there is no water potential difference and the

Which Sugar Concentration Osmosis Best Takes Place on a Potato Chip

2635 words - 11 pages Which Sugar Concentration Osmosis Best Takes Place on a Potato Chip I am going to conduct an investigation to find out at which sugar concentration osmosis best takes place on a potato chip. Osmosis is defined as the net movement of water or any other solution with molecules from a region in which they are highly concentrated to a region in which they are less concentrated. This movement must take place across a

To study how concentration affects the rate of a reaction

1105 words - 4 pages collisions and more energy will be given out.*Concentration - If a solution is highly concentrated it means that there are a lot of particles that can collide. This means that there is more chance that a reaction will occur.*Catalyst - A catalyst gives the reacting particles a surface to stick to and still collide. This lowers the activation energy, making it easier for the reaction to take place. A catalyst does not take place in the reaction itself

Similar Essays

The Concentration Of Sugar In The Cell Sap Of A Potato Cell's Vacuole

1898 words - 8 pages The Concentration of Sugar in the Cell Sap of a Potato Cell's Vacuole Plan In this experiment I am intending to investigate the concentration of sugar in the cell sap of a potato-cell's vacuole. I will discover this using my knowledge of the biological process of Osmosis. Osmosis is the movement of solvent (usually water) through a semi

An Investigation Of The Glucose Concentration Of The Cell Sap In Potato Cells

4213 words - 17 pages An investigation of the glucose concentration of the cell sap in potato cells In this experiment I intend to investigate the effects of osmosis on potato cells. Specifically, I intend to use my knowledge of osmosis to investigate the glucose concentration of the cell sap in potato cells. Osmosis is a method by which water levels on either side of a semi permeable membrane may balance themselves. It occurs between regions of high water

Titration Finding The Concentration Of A Solution Of Sulphuric Acid

2455 words - 10 pages Finding out the accurate concentrain of sulphuric acidAimThe point of this investigation is to find out the concentration of the sulphuric acid in my experiment. I will do this by titrating the sulphuric acid with sodium carbonate.H2SO4 + Na2CO3 à Na2SO4 + H2O + CO2Acid + Alkali à Salt + Water + Carbon dioxideRatio of sulphuric acid to sodium carbonate:H2SO4 : Na2CO31 : 1Concentration of sulphuric acid:H2SO4 is approximately 0.05

Investigate The Effect Of Varying Solution Concentration On Osmosis In A Potato Chip

4330 words - 17 pages by osmosis, making the cell swell in size. The cell is now known as turgid. If a potato cell was placed in the same circumstances the cells would increase in length, volume and mass because of the osmotic effects. If the same potato cells were placed in a solution with a low water concentration, then the effects would be the opposite - water would move out of the cell into the area of lower concentration, the water. Thus, the potato chip will