Dear Fellow Chemists,

Here’s a description of an unexpected reaction. Please speculate as to the chemical root causes…

A person:

1.    measured out 400 mL of acetic acid and transferred it to an open mouth flask

2.    measured 100 mL of bromine and transferred part of that to the same flask

3.    realizing that the flask into the liquids were being transferred was not large enough

4.    retrieved a 1 L flask and transferred the partial mixture into this larger flask

5.    then poured the rest of the bromine into the 1L flask

Here’s the unexpected part…

=B7         A second or two after the final aliquot of bromine was added the mixture erupted, forcing the contents out of the flask with significant velocity

We have assumed that there was some easily oxidized contaminant in the 1 L flask which was not noticed by the person involved…

Does anyone have a history with this material that would possible provide alternate explanations?

If you prefer to communicate off-line, please do.

Sincerely,

-Russ