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How the change of temperature affects the rate the jelly dissolves.

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Introduction

How the change of temperature affects the rate the jelly dissolves. My aim if to find how the change in temperature affects the rate the jelly dissolves. I predicted that as the temperature increases the solute will dissolve faster. This is because as the temperature increases the solvents atoms will vibrate and move more rapidly. As the solvents atoms increase their movement, they bump into the solute more often. Whilst they do this they carry bits of the solute away, slowing dissolving the jelly. To carry out my investigation, I will measure the time it takes for the jelly to dissolve at different temperatures. Equipment * 250ml beaker * Thermometer * Bunsen burner * Gauze * Tri-stand * Thermal mat * Jelly (2cm� x 12) ...read more.

Middle

Throughout my experiment I will stir moderately with the thermometer. Additionally at the end of each experiment I will take the finishing temperature. This will allow me to find the average temperature of the experiment, as room temperature is much lower and will interfere with my experiment. For each experiment I will repeat it three times, which will allow me to find a mean as a result instead of relying one just which could be very inaccurate. Thermometer Jelly H2O + Stop Watch HEAT Fair test So that my experiments are fair I will keep the size and type of the jelly the same and the amount of water I use. ...read more.

Conclusion

From looking at my results and especially my graphs and can see that some are inaccurate, these are highlighted. Human error, for example stirring slightly differently or maybe that could have caused these results to be differently. Additionally I had to change some details in my method, as there weren't the resources. I was unable to use polystyrene, which meant that I lost more heat than I could afford to in my investigation. Furthermore I had to use a kettle and mix cold water and hot instead of a Bunsen burner. If I did my experiment again I would take more to time to get more accurate results. Maybe repeat each one ten times, placing polystyrene over the top to insulate the heat and use a Bunsen burner at get a more accurate temperature to start off my experiments. ...read more.

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