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Hi, I need help with essay on Aspirin. Paper must be at least 3500 words. Please, no plagiarized work!ration, a standard titration and a colourimetry experiment will be undertaken to determine the amo
Hi, I need help with essay on Aspirin. Paper must be at least 3500 words. Please, no plagiarized work!
ration, a standard titration and a colourimetry experiment will be undertaken to determine the amount of acetylsalicylic acid in each of three commercially available aspirin brands (as well as acetylsalicylic acid created in the laboratory – see below). Back titration involves using phenolphthalein as an indicator, as well as the principles of the pH scale to determine how much of the acid is present by using known quantities of a basic solution (in this case NaOH). Colorimetry involves the use of iron (III) chloride, a strongly coloured compound, to determine how much of the acetylsalicylic acid is available by using a previously calibrated scale of light reflection and colour density. 2) (AS) Which purification method is the most appropriate and accurate? To answer this aim, we need to compare the three methods outlined above, colourimetry, standard titration and back titration. We can do this by seeing which produces the most consistent results by adding the results to a chart and measuring the standard deviation of the results given. 3) (AS) Which type of titration (back or forward) is the most appropriate in this situation? There are two types of titration that can be used in this experiment. Back titration relies on the use of an excess of alkali and reacting this excess with acid to determine the concentration. Forward titration relies on the acid + base = salt + water principle. We can see which one works faster and gives standardised results. 4) (AS) Which type of acid (monoprotic or diprotic or triprotic) is the most effective in the purification process? A monoprotic acid is one that can donate one proton per molecule during the dissociation process. a diprotic can donate two and a triprotic can donate three.
