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1) Title: V3 Analysis of the content in Aspirin Tablet 2) Aim/Objective: To find out the mass of aspirin in each tablet by using back titration 3) Theory In this experiment, hydrolysis and back titration are carried out to determine the mass of the active ingredient aspirin in each aspirin tablet to see if it is the same as that stated on the package. Hydrolysis is a chemical process in which a molecule is cleaved into two parts by the addition of a molecule of water. Since aspirin (2-ethanoylbenzoic acid) can be readily hydrolysed using sodium hydroxide, forming the sodium salts of two weak acids, ethanoic acid and 2-hydroxybenzoic acid, and a water molecule, excess sodium hydroxide is used to react with aspirin in a conical flask initially, as illustrated in the following series of equations: CH3COOC6H4COOH(aq) + NaOH(aq)› CH3COOC6H4COO -Na+(aq) + H2O(l) CH3COOC6H4COO -Na+ (aq) + H2O(l) ? HOC6H4COO-Na+ (aq) +...

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