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10 Jun 2020 12:18:12 UTC
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Make Hydrobromic Acid Revisited 2018
We show how to make hydrobromic acid.
Hydrobromic acid is the bromine analogue of hydrochloric acid. While too expensive to use as much as hydrochloric acid, it's often used when the bromine element itself is needed. For example a major use is the synthesis of organobromine compounds like the ones we used in our grignard reactions.
To make it, we start with 400mL of water and add to it 250g of sodium bromide. Sodium bromide is available as a bromine source for swimming pools. To this we add 200mL of sulfuric acid, I got mine from drain opener.
The mixture is stirred until everything is dissolved and then cooled to freezing to crystallize out the byproduct sulfates and bisulfates.
The filtrate is then distilled until half the volume has been transferred and then allowed to cool. More crystals should crash out. This is filtered again and the filtrate is again distilled.
...
https://www.youtube.com/watch?v=4ei_xUIhRas
Hydrobromic acid is the bromine analogue of hydrochloric acid. While too expensive to use as much as hydrochloric acid, it's often used when the bromine element itself is needed. For example a major use is the synthesis of organobromine compounds like the ones we used in our grignard reactions.
To make it, we start with 400mL of water and add to it 250g of sodium bromide. Sodium bromide is available as a bromine source for swimming pools. To this we add 200mL of sulfuric acid, I got mine from drain opener.
The mixture is stirred until everything is dissolved and then cooled to freezing to crystallize out the byproduct sulfates and bisulfates.
The filtrate is then distilled until half the volume has been transferred and then allowed to cool. More crystals should crash out. This is filtered again and the filtrate is again distilled.
...
https://www.youtube.com/watch?v=4ei_xUIhRas
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