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Permeability of a Membrane Report Apparatus and Method Everything was one as set out in the plan. Table of Results Temperature °C Light Transmission % Average 30 95 92 91 93 40 88 83 81 84 50 75 73 78 75 60 66 88* 68 67 65 57 59 54 57 70 6 8 6 7 80 2 4 5 4 Average = 95+92+91 3 Comments The starred result has been classed as an anomaly due to its lack of concordance with the other two. For this reason it was ignored when calculating the average. Visual Observations At higher temperatures some water vapour was seen this may have made the pigment less dilute then it would have been had no water escaped. Also at higher temperatures the cubes were seen to float this would increase the surface area because at lower temperatures some faces of the cube were pressed against the sides of the test tube. Errors The random errors were: * Maintaining the temperature of the water bath +/- 10% (this was the most significant) * Human error in reading the thermometer +/- 2% * Human error in reading the colorimeter +/- 2% The systematic errors were: * Inaccuracies in...

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