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The aim of this experiment is to see the effects on potato chips after placing them in different concentrations of sugar solutions.

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Introduction

Effect Of The Concentration Of A Sugar Solution On A Potato Aim The aim of this experiment is to see the effects on potato chips after placing them in different concentrations of sugar solutions. Prediction The potato chip will decrease in length and weight of concentrations 80% and 60%. At 40% the potato will stay the same. At concentrations 20% and 0% the potato will increase in length and weight. Scientific Knowledge This occurs due to Osmosis. Osmosis is the net flow of water through a selectively permeable membrane. It's really a special case of diffusion, in which only the water molecules move from one region to another. Water molecules move from a high concentration to a region of low concentration. Apparatus 1) 5 specimen bottles with caps on them labelled A, B, C, D and E. 2) 1 potato 3) 1 knife 4) 1 Weighing machine 5) Distilled water 6) Sugar solution 7) Ruler Method 1) First cut and peel 5 potato chips. ...read more.

Middle

4.1cm 3.95cm 3.6cm 3.5cm Conclusion Having completed the experiment and collected the results, I can know say that my prediction was true. As we increased the concentration of sugar solution, the weight and the height of the potato chip decreased. At 0% sugar solution i.e. 100% pure water, there was more water molecules outside the chip then inside. Therefore water moved from a high concentration (outside the chip) to a low concentration (inside chip). This resulted in the chip weighing more, an increase of 0.2 grams. The height of the chip also increased from 4cm to 4.3 cm, an overall 0.3 cm increase. This made the appearance of the chip look fatter. At 20% sugar solution i.e. 80% water, there was still more water outside than inside thus water moved into the chip. There was an increase in weight and height, however it was not as much as 0% sugar solution. The height increased by 0.1 cm and the weight by 0.1 grams. ...read more.

Conclusion

It is also important to use distilled water and not tap water as it contains impurities and minerals and these impurities could have an effect on the experiment. Its important that a fair test is always conducted as this allows one to achieve more accurate and reliable results. I tried to make it a fair test by using the same potato for all my samples and made sure all the potato chips were roughly cut the same size and weighed the same. I believe my results were quite reliable and there weren't many anomalies. Further work could have been done to achieve a wider range of results such as measuring the results at say 25%, 30%. 35%, 40%, 45% etc. By doing this we would have achieved more accurate results which might have defined a clearer pattern. This would have given more evidence for our conclusion and would have extended our investigation. I enjoyed doing this investigation, and now fully understand osmosis. By Zahid Siddique 10E. ...read more.

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