The student is going to see what happens to the weight of a potato when it is placed into different solutions Science GCSE coursework: Remove the potato strip, dry it carefully using paper towel.
And a solution which is in equilibrium with the cell contents is isotonic. In this experiment, the concentration of the sugar solution will be the variable. Osmosis In this video we look at osmosis. Make sure each tube is labelled with the concentration.
Observe the cells for a few minutes. We put 2 pieces of potato in each of the six test tubes. Gcse Biology Coursework Osmosis Potato — — Bienchoisir Gcse Biology Coursework Osmosis Potato — — Bienchoisir, conseils travaux, questions travaux, projets travaux Biology coursework osmosis in a potato — The Student Room I was wondering if anyone could help me out with my coursework.
However, for A-level studies you would need to convert the concentrations into molar equivalents, and process the data on graphs showing standard deviation bars in order to assess the variation in repeats.
They move from areas of quot;high water concentration quot;, such as dilute solutions of say, sugar, to areas of quot;low water concentration quot;, such as concentrated solutions of sugar, until there is an equal concentration of water molecules on both sides.
Teaching notes The advantage of using blackcurrant squash is that students can see at a glance which is the most concentrated solution. Make sure when weighing the potato cylinders, that their masses are not mixed up when recording them.
That means that if the water outside the cell is saltier than the water inside, water will move from the inside of the cell to the outside. Another step to ensure a fair test was cleaning all of the apparatus thoroughly before the experiment.
The potato is made up of tiny, living units called cells. This will have a concentration of sucrose of 0. We used an electronic balance for weighing the potato cylinders, a ruler for measuring the lengths and a measuring cylinder for the solutions.
Results We made a table to record our results and work out the percentage change in mass. The potato has soaked up some of the water. The solutions should completely cover the chips. It was important to get all of the measurements, weights and volumes as precise as possible.
We placed the potato cylinders on a paper towel in order to dry any excess residue from them, and keep it a fair test. Method Prepare a range of sucrose sugar solutions. For each sucrose concentration, repeat the investigation for several potato cylinders. The water tends to move towards higher concentrations of dissolved chemicals.
What occurred here was osmosis. Measure and record the mass of the potato strip. It seems to have wilted, gotten very soft and flexible. To investigate the effect of varying concentration of a certain sugar solution on the amount of osmotic activity between the solution and a potato chip of a given size.
To create a fair test certain aspects of the experiment will have to be kept the same whilst one key variable is changed. It could also be carried out using salt — sodium chloride solution — instead of sucrose. As the water left the cell it was much like letting the air out of a balloon.
We used a graph to plot the percentage change in mass for each of the different sucrose solutions; it was also used to show any anomalous results gained through error or accident.
Aims of the experiment To investigate the effect of a range of sucrose solutions on the mass of potato cylinders.Aug 27, · In this video, we look at the required practical investigating the effects of osmosis on plant tissue.
I take you through the stages and how to calculate per. - Investigation of Factors Affect Osmosis in Potatoes Aim The aim of the following experiment was to investigate the effect of varying the concentration of sucrose solution on osmosis in a potato. Preliminary Experiments One preliminary experiment was done before the main experiment.
The aim of this experiment is to investigate the movement of water in and out of plant cells. We will write a custom essay sample on Experiment to Investigate Osmosis in Potatoes specifically for you. for only $ $/page. Order now. Search. Related Essays. The effects of osmosis ; Osmosis and Potato Chips ; To investigate the effect.
on potato tissue. It could also be carried out using salt solution instead of sucrose. Aims of the experiment. To investigate the effect of a range of sucrose solutions on the mass of potato.
Describe experiments to investigate diffusion and osmosis in living and win living systems. Diffusion living - EXPERIMENT to show the effect of temperature on diffusion in beetroot Independent variable - Temperature.
Investigation of Factors Affect Osmosis in Potatoes Aim The aim of the following experiment was to investigate the effect of varying the concentration of sucrose solution on osmosis in a potato.
Preliminary Experiments One preliminary experiment was done before the main experiment.Download