The Effects of Glucose Concentration on Osmosis in Potato Cells
Apparatus: -
* Potato
* Blade
* Cork borer
* Stopwatch
* Glucose solution
* 50cm3 Measuring cylinder
* Electronic Balance (scale in grams)
* Five 200cm3 beakers
* Forceps
* Labels
* Water bath
Procedure: -
* First cut the potato into half
* Using the cork borer cut the potato to obtain five cylinders of
potatoes
(Make sure that the potato cylinders are from the same potato as the
potato tissues maybe different from different aged potatoes)
* Cut the potato cylinders down to the same length
* Measure the mass of the each potato cylinder
* Note down all your results in the table shown below
Solution 1
Solution 2
Solution 3
Solution 4
Solution 5
Mass of potato before experiment (g)
Mass of potato after experiment (g)
Difference of mass of potatoes.(g)
* Use five different concentrated glucose solutions:-
v 2% glucose solution
v 4% glucose solution
v 6% glucose solution
v 8% glucose solution
v 10% glucose solution
* Set up 5 beakers and pour the glucose solution in to them
* Using a measuring cylinder, measure 20cm3 of each of the solutions
and pour it into the beakers.
* Label the beakers according to the concentration of the solutions.
* Add the potato cylinders to the solutions
* Immediately time the experiment for fifteen minutes(make sure that
all the experiments are timed for the same period)
* After fifteen minutes, remove the potato cylinders from the beakers
* Wipe off any excess solution off the cylinders
* Using the electronic balance measure the mass of the potato
cylinders
* Note the mass down in the table at the end of the first page.
* Repeat this experiment three more times.
* After carrying out the experiment three more times, average the
The mass of Mg + the mass of O2=mass of MgxOx. Knowing the mass of
molecules go in and out of the cell. There is no net movement of water
I am going to carry out an experiment to measure the change in mass of
cork borer and a ruler. I will keep the potato chips the same size in
If the concentration of sucrose increases, then the mass of the potato will decrease. 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.
Water Potential of Potato Cells Aim: To demonstrate the Water Potential of Potato Cells. Objectives: · To show the water potential of potato cells using various measured concentrations of a sucrose solution and pieces of potato. · To record and analyse data to verify observed results. · The method and procedure was carried out as per instruction sheet. Observations: The experiment shows that the lower the concentration of the sugar solution, in the Petri dish, the mass of the potato increased.
the same way as it does potato. I would also widen the range of sugar
Osmosis in Carrots Background Osmosis is the diffusion of water from a dilute solution to a more concentrated solution through a partially permeable membrane, which allows the pass of water molecules but not solute molecules. [IMAGE][IMAGE][IMAGE][IMAGE][IMAGE][IMAGE][IMAGE][IMAGE]If a cell is placed in a less concentrated solution water enters because the less concentrated solution will have a high concentration of water than the inside of the cell. Once the cell takes in maximum water the cell becomes turgid. If the cell was to be placed in a high concentrated solution, water would leave the cell because the cell would contain a low concentrated solution. So in the low concentrated solution there will be a high concentration of water and in the high concentrated solution there will be a low concentration of water.
Mass of KClO3 = Mass of crucible, cover and KClO3 (Step # 3) - Mass of crucible and cover (Step # 1)
find the rate I have to find the mass change in 1 hour, and I will
Investigating the Effects of Different Concentrations of Sucrose Solution on Potato Cells Aim: to investigate the different effects of various concentrations of sucrose solution on potato cells. Introduction: Osmosis is a special type of diffusion. Osmosis happens when two solutions of different concentrations are separated by a selectively permeable membrane. A selectively permeable membrane has holes in it which are just big enough for water molecules to pass through, but not the much larger sugar molecules. Water moves across the membrane from a weak solution (high concentration of water molecules) to a stronger solution (lower concentration of water molecules).
Investigation of the Concentration and the Effect of Sucrose on Osmosis in Apple and Potato Tissues
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4. Put each group of potato discs in one of the 6 test tubes and watch