Investigation to determine the concentration of sucrose in potato

The previous investigation we did was investigation how the length of a beetroot strip changed with different molarity of the solution. From the graph I drew I can see that the higher the molarity in the solution gets, the less the beetroot will grow. The beetroot in the 0.00 molar solution became very solid and firm this means that the beetroot had become turgid. We can tell this by looking at how the size of the strip changed. However when the beetroot strips were put in a high molarity solution there was not as much osmosis taking place as we can see from the graph I have drawn

 To do the investigation to determine the concentration of sucrose in a potato

1. First I shall take 3 fresh potato slices and weigh them
2. I will use 5 different concentration solutions, To make sure the test is fair I shall use 3 potato chips in each solution and average then.
3. I shall leave all the potatoes in the solutions for roughly a day.
4. I shall take the potatoes out of the solution.
5. Then pat them dry with a paper towel.
6. Finally I shall weigh each of the potato chips individually and record the results.

For this investigation I shall use

5 Mc Cartney bottles

15 potato cores of even sizes

5x three different coloured cottons.

1 electronic weighing scales

1 paper towel

The scientific knowledge I have for this investigation is from a previous investigation. It was also an osmosis investigation so the knowledge that I gained from that investigation can be used in this investigation. For the results of the beetroot experiment, I plotted a graph. My graph has a very definite curve. And the line of best fit proved exactly what I had thought before, that as you increase the concentration of sucrose the rate of osmosis decreases.

 We can make this investigation a fair test by using the same variety of potato the same. Making sure we use the same scales to weight the potato before and after the investigation. When the three slices of potato are in the solution we have to make sure we can tell the difference between these three chips so me can weigh them accurately at the end. To do this we shall a small piece of different coloured cotton to each of the chips. However in order to make this a fair test we must make sure that the cotton does not cover a large area of the potato and also that the area of potato covered on each one is the same on each of the slices.

 To do this I will use 5 different concentration solutions, To make sure the test is fair I shall use 3 potato chips in each solution and average them just to make it a fair test. Also to make sure is a fair test