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
Mass of KClO3 = Mass of crucible, cover and KClO3 (Step # 3) - Mass of crucible and cover (Step # 1)
Investigation of the Concentration and the Effect of Sucrose on Osmosis in Apple and Potato Tissues
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find the rate I have to find the mass change in 1 hour, and I will
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
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