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Chemistry: Data Analysis for the most suitable material for a backpacker's towel

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Introduction

Chemistry: Data Analysis for the most suitable material for a backpacker's towel. Method In groups, we tested three different types of material (named pale blue, dark blue and brown) to find out which one would be more suitable as a backpacker's towel. The criteria that would make a good backpacker's towel would be aspects such as a low density, high absorpancy, rapid drying etc. We weighed the fabric before wetting it and weighing it again. We then hung it on some suspended string and let a rotating fan dry them for fifteen minutes. After this time was up, we weighed the materials again in order to work out the drying rate, the absorpancy and the amount of water lost. We then recorded our results in a table (displayed further on) and analysed these to come to a conclusion. Results Fabric Area (cm�) Dry mass Wet mass Mass after drying Absorpancy Water lost Drying rate Wet mass - Dry mass Density Pale blue 1 391 9.5 29.9 26.4 2.1 3.5 14 20.4 243 Pale blue 2 358 9.9 47.2 43.6 3.8 3.6 14.4 37.3 276.5 Pale blue 3 360 9.4 38.8 26.3 3.1 12.5 50 29.4 261.1 Pale blue 4 352 9.1 43.2 44.9 3.7 -1.7 -6.8 34.1 258.5 Pale blue 5 265 9.3 38.6 25.5 3.2 13.1 52.4 29.3 351 ...read more.

Middle

The pale blue data for drying rate shows a very high anomaly and a very low one, with the data taken into consideration ranging from 14 to 52.5. The Dark Blue fabric ranges from 12.5 to 39.5, with two higher anomalies and the brown fabric ranges from 18.5 to 42.5 with 1 anomaly. To summarise, the brown fabric had the lowest absorbency, then the dark blue and then the pale blue. The dark blue fabric had the lowest drying rate, then the brown fabric and then the pale blue fabric. To conclude, the pale blue fabric was identified, from interpreting my graphs, as the best fabric for a backpacker's towel, so at this point the pale blue fabric would probably be better that the dark blue and brown fabrics for a backpacker's towel. Evaluation There are many factors in this investigation that weren't done accurately, that could be improved and/or repeated in order to find more accurate results. The variables themselves and the way in which the data was collected plays a major part in the accuracy of the results. The first thing is that not all the fabrics were of the same size - they had different areas. This means that some could hold more water than others and eventually taking longer to dry. ...read more.

Conclusion

However, we are obviously restricted for time within a one-hour lesson. With regards to the actual results, there can be some improvements made. Firstly, There was not an even ratio of pale blue, to dark blue, to brown fabrics. There were seven pale blue fabrics handed in and eleven of the dark blue and brown ones. This could have affected the results, particularly with the fact that the pale blue fabric contained the best criteria for a backpacker's towel. Also, there were some blanks in the data which could have affected the overall averages and results. To improve this, all data should be collected and recorded and repeat readings would increase accuracy. Conclusion My graphs clearly show the grouped data for each fabrics and anomalies. From these graphs, it can be said that the pale blue fabric would be the material best suitable for a backpacker's towel because it has a high drying rate and a high absorbency. However this is only from one experiment; this experiment, and so it may be found that if the same experiment was done again, different outcomes would occur. So to conclude, repeating the methods and the experiment, with all variables checked will give more accuracy. Repetition is the key. ?? ?? ?? ?? Chemistry Coursework February 2005 ...read more.

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