# The Effect of Changing the Concentration of Sucrose on the Movement of Water into a Potato

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The Effect of Changing the Concentration of Sucrose on the Movement of Water into a Potato Introduction Aim 1. To use different concentrations of sucrose solution to determine the internal concentration of the potato. 2. To use different concentrations of a solution more dilute than the internal concentration of the potato to find out what the effects of different sugar concentrations have on the movement of water into the potato. Theory ====== Osmosis is the movement of water from a dilute solution to a more concentrated solution, through a partially permeable membrane, until the concentrations are equal. Linking this to my aim, we need to find out the internal concentration of the potato so that we will know which concentration of sucrose solution will make water move into the potato, though Osmosis. Once we have done this, it is possible to increase the dilution to find out the effects that different sucrose concentration have on the movement of water into the potato. Prediction ========== 1. If the internal concentration of the potato is the same as the concentration of the solution, then osmosis will not happen and the weight will remain unchanged. 2. The more dilute the solution, the greater the movement of water due to osmosis and therefore the greater the change in weight. Fair testing ============ Firstly, we are using six discs in each measuring beaker. This is to make sure that when cutting up the potato cylinder into 0.5cm discs we know that the surface area of 1 potato disc will measure out the surface area of another. Then, we are going to leave them for 24 hours. This is to make sure that all the Osmosis that is going to happen will happen. Also they will be kept in the same place so that the temperature will always be the same at every point of the 24 hours. Thirdly, we are going to cover them with cling film so that the water