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[AnAn]

Outline an experimental method for determing the acid content in aspirin ( acetylsalicylic acid) given that it is a monoprotic acid

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[CM_Tutor]

Titrate it with a strong base, like NaOH, using phenolphthalein as indicator. Note that this must be done rapidly, as otherwise NaOH will also cause base hydrolysis of the ester. Also, this is not a good analysis technique for an aspirin tablet, as most comtain other acids, notably citric acid, as well.