Bubbles in buret experimental error

[i_love_science]

When bubbles are not removed from a buret before a titration, the measured volume of titrant used is more than the actual volume used. Then the analyte concentration will be greater than the actual concentration, and the mass of the analyte will be greater as well.

Instead, it will actually lead to low results. Could anyone explain why, and where my reasoning went wrong? Thanks.

 

[Borek]

It actually depends on what happens to the bubbles - whether they go up (or stay in place when the titrant levels passes them, which is effectively the same), or go down with the titrant.

I saw them do both.