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Gold Chem Part 2 - Bromoauric Acid & Potassium Auribromide KAuBr4

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First published at 22:41 UTC on December 15th, 2019.

poormanschemist

PoorMansChemist

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In this video I make bromoauric acid by reacting precipitated gold powder with hydrobromic acid and elemental bromine generated by the addition of small portions of 48.5% nitric acid. Once the bromoauric acid solution was made potassium bromide was added and the solution was put through several cycles of evaporation and reconstitution with water to remove the residual HBr, Br2, and HNO3. The final product was crystallized under vacuum (no crystal film pics on this video though).
I couldn't figure out how to put a link in this video on BC so I am going to include a link to my buddies channel here: https://www.youtube.com/channel/UCkI_VAWYzdy96RiZQlweMlA

Atomistry.com Auribromic Acid Article: http://gold.atomistry.com/auribromic_acid.html

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Category	Science & Technology
Sensitivity	Normal - Content that is suitable for ages 16 and over

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