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April 20, 2014

Homework Help: APChem

Posted by Kiki on Sunday, March 7, 2010 at 9:00pm.

If an air bubble passes unnoticed through the tip of a buret during a titration (where a weak nonvolatile acid HA is the analyte) , the calculated molar mass of HA would be too high, too low, or not affected?

I thought it would be too high, since an air bubble in the buret means that the volume of base(titrant)is actually less than it should be; since the amount of base reacting with the acid(anlyte) is less , the amount of acid that is needed to react is also less....so it would seem that if the necessary amount of acid needed to react is small, then the molar mass of that acid should be large...so the calculated molar mass of HA would be too high.....

Does this sound right?



THank you!!!!

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