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REMOTE LAB MAKEUP...
RECORD this randomized mass of starting material -->
This is similar to what's in the procedure, just a little higher or lower.
Recalculate the theoretical yield of bromophenacetin
Note: each time you refresh the page, it will give a new phenacetin mass. Best to stick with the first one!
The reagents in this reaction are super not good for you.
The reagents in this reaction are super not good for you.
Add phenacetin, potassium bromate, and acetic acid to a cute lil Erlenmeyer...
Add phenacetin, potassium bromate, and acetic acid to a cute lil Erlenmeyer...
measure reagents.mp4
SAFETY:
Hydrobromic acid and acetic acid are corrosive
Potassium bromate is an irritant & oxidizer
Acetominophen, chloroform-d, potassium bromate, and hydrobromic acid are toxic
Acetic acid is flammable
Chloroform-d, potassium bromate, and phenacetin are potential carcinogens or mutagens
Add the HBr and things start to happen!
Add the HBr and things start to happen!
add HBr.mp4bromine formation timelapse.mp4The bromine gas formed is corrosive and toxic. Do not inhale!
The bromine gas formed is corrosive and toxic. Do not inhale!
The orange color shows Br2 is being formed in situ
The orange color shows Br2 is being formed in situ
In sit-who?
In sit-who?
In situ means that the reacting agent (reagent) is formed by a chemical reaction that takes place in the reaction flask, rather than adding the reagent directly.
In situ means that the reacting agent (reagent) is formed by a chemical reaction that takes place in the reaction flask, rather than adding the reagent directly.
In this case, bromide, bromate, and acid react to form Br2, the electrophile in this EArS reaction. This is highly preferred considering Br2 is toxic and difficult to work with.
5 Br - + BrO3 - + 6 H3O+ --> 3 Br2 + 9 H2O
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