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Perform an investigation on the length of time it takes for a certain amount of sugar to dissolve in a certain amount of water at different temperatures

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Introduction

Nicole Ryan 10s Mr Johns Investigating dissolving Introduction I have been asked to perform an investigation on the length of time it takes for a certain amount of sugar to dissolve in a certain amount of water at different temperatures. I will investigate whether the time taken at one temperature and another will be the same, quicker or slower using scientific methods. Identifying Key Factors The factors that would affect the dissolving rate are: * Volume of water The larger the volume of water, the quicker the sugar will dissolve because there is more particles for the sugar molecules to collide with * Mass of sugar The more sugar there is the dissolving rate will be slower * Size of sugar particles The bigger they are the slower they will dissolve * Temperature the higher the temperature the quicker the sugar will dissolve I will keep all these factors constant except temperature. ...read more.

Middle

* Measure 10g of sugar and 100cm( of 20(C water * Pour water and sugar into the glass beaker, start the stop-clock and begin stirring * Constantly stir until the sugar dissolves and then stop the clock and record the time in a results table * Repeat the experiment again using the same temperature to ensure a more accurate result * Repeat experiment using different temperatures (Put goggles on before lighting gas to heat the water) * Create an average time for all temperatures and then plot a graph to show results Results table Temperature ((C) Time taken 1st Attempt (Seconds) To dissolve 2nd attempt (Seconds) Average (Seconds) 30 45 47 46 40 35.5 36 36 50 31 31 31 60 24 25 24 70 22 23 22 80 20 20 20 Conclusion As I expected, when the temperature was raised the quicker the sugar dissolved. ...read more.

Conclusion

The temperatures and quantities that I chose to use worked very well in the experiment. Although I took care in keeping all factors the same for a fair test and I repeated the experiment and worked on the averages of my findings I still found 2 anomalous results when I plotted my graph. I think this is because of my rate of stirring could not be kept constant. To improve the experiment I would only stir 10 times instead of stirring constantly throughout the dissolving process. And I also think to improve the experiment further I should repeat my readings another time and figure out the average with my third findings. These improvements will give a more accurate result. A way to extend this experiment is to test how long the sugar would dissolve if it had a larger mass. I think this experiment was carried out with great care and instructions were followed to the best of my ability. ?? ?? ?? ?? ...read more.

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