Question

A)How would the calculated number of grams of Aspirin in a tablet be affected if not all the crushed Aspirin tablet was transferred into the 250 mL beaker before you begin the titration? Explain! B)How would the calculated number of grams of Aspirin in your tablet be affected if you didn't notice that the buret was filled above the 0.00 mL mark? Explain!

Answer 1

A) Aspirin compound is evenly distributed within the aspirin tablet. This means if amount of aspirin tablet is less, then amount of aspirin is also less.

If not all the crushed Aspirin tablet was transferred into the 250 mL beaker before you begin the titration, then amount of aspirin is also less and hence calculated number of grams of aspirin is also less.

B) If the buret is filled above 0.00 mL mark, then amount of titrant shown on buret after titration will be less than actually used.

This means calculated moles of titrant used will be less than actual.

This also means amount of aspirin present will be less than actual because moles of titrant = moles of aspirin

Hence number of grams of asprin will be less than actual