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Sugar Investigation

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Introduction

Sugar Investigation \\Input Variable Outcome Variable Temperature Time taken for the sugar to dissolve Volume of Water Number of Stirs Amount of Sugar Type of Sugar The input variable we are testing is the temperature to see if the time taken for the sugar to dissolve differs. Prediction I predict that when the temperature of the water increases, the time taken for the sugar to dissolve in the water will be quicker than dissolving at a low temperature. This is because, the particles in a solid are very close together and are in a fixed position. The particles in a liquid are very close but are not in a fixed position causing them to flow over each other. So when a solid is put into a liquid, the liquid particles collide with the solid , causing the solid to get smaller and eventually dissolve. ...read more.

Middle

Temp (degrees Celsius) No: of stirs per minute Amount of sugar (grams) Time taken to dissolve (secs) 1st experiment Time taken to dissolve (secs) 2nd experiment Time taken to dissolve (secs)3rd experiment Average time (secs) 30 3 3.1 302 301 310 304 40 3 3.1 256 260 273 263 50 3 3.1 196 210 189 198 60 3 3.1 133 127 118 126 70 3 3.1 106 103 98 102 Conclusion I have found out that as the temperature increases the time taken for the sugar to dissolve decreases. For example at 30 degrees Celsius it took 302 seconds but at 70 degrees Celsius it took just 106 seconds. This can be seen in my graph. As you increase the temperature, the time taken for the sugar to dissolve decreases. As I said in my prediction this is because, as you heat the water, the particles will move more, therefore collide more often with the sugar causing it to dissolve quicker. ...read more.

Conclusion

There is only 2 odd results which I think is due to the temperature of the water which could not be kept at the same temperature. The result were the temperature was at 30 degrees Celsius is odd because it took less time than expected and did not fit the best of fit line. Also the 2nd experiment were the temperature was kept at 50 degrees Celsius. This took longer than the other 2 experiments. This is also due to the temperature of the water. We can improve the results and experiment. This is by using a water bath to keep the temperature of the water at a set temperature. Also you can also use a stirring machine ,which you can set how many stirs per minute to make it more accurate.This can make our results more reliable and more accurate. We can also change the variable to see what other variables affect the time taken for the sugar to dissolve for example the amount of water. ?? ?? ?? ?? ...read more.

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