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# Investigation to determine the concentration of sucrose in potato

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Introduction

Investigation to determine the concentration of sucrose in potato For this investigation I want to find out what effect different concentrations of sucrose in water have on potato slices. Our aim is to explore osmosis and its effects on different concentrations of water. We know that Osmosis is the passage of water from a region of high water concentration through a semi-permeable membrane to a region of low water concentration. From this we can deduce that the lower the sucrose concentration in the solution the higher the rate of osmosis will be. We know this because, only the water will pass through into the potato where as the sucrose cannot. It is important to make this investigation a fair test so that our results are accurate and reliable. ...read more.

Middle

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. ...read more.

Conclusion

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 Lucie Walker ...read more.

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# Related GCSE Life Processes & Cells essays

1. ## Investigating the effect of Sucrose Concentration on the Rate of Osmosis in Potato Chips.

5 star(s)

investigation to a stage where the potato chip was weighed at twenty minute intervals after the hour, and the change in mass had not varied between this time. No variation in mass would have proved that osmosis was complete and I could terminate that experiment because the potato cells were either completely plasmolysed or turgid.

2. ## Osmosis investigation

I kept the chips in for only 35 minutes so osmosis couldn't take place for that long, explaining the quite small percentage changes. This made me decide I would leave my chips in my solution for 1 hour in the real experiment, so osmosis has a longer time to take place- providing more time for water movement and clearer results.

1. ## Osmosis investigation.

A typical palisade cell: Solute molecules in a solution tend to prevent the water molecules leaving it, the solution will have a lower water potential than pure water therefore its value will be less than 0 (i.e. negative). If pure water were on both sides of the membrane, the osmotic

2. ## Osmosis investigation.

through in and out of the solution and the potato, depending on the concentration gradient of the two substances. So in this case, when the water concentration is lower in the tissue, the water will go inside the tissue of the potato, and the potato will gain mass.

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