If 9.89 mL of 0.106 M sodium hydroxide is required to titrate the acetylsalicylic acid in...

If 9.89 mL of 0.106 M sodium hydroxide is required to titrate the acetylsalicylic acid in an aspirin tablet, how many milligrams of acetylsalicylic acid are in the tablet? (MW acetylsalicylic acid = 180.157 g/mol)

Expert Solution

1 mole of acetylsalicylic acid reacts with 1 mole of NaOH

moles of NaOH used = molarity x volume

= 0.106 M x 9.89 ml

= 1.05 mmol

moles of acetylsalicylic acid reacted = 1.05 mmol

milligrams of acetylsalicylic acid present in the tablet = 1.05 mmol x 180.157 g/mol

= 189.165 mg

queen_honey_blossom answered 2 years ago

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