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Synthesis

Chemistry In Pictures

Chemistry in Pictures: Chloroauric acid crystals

by Craig Bettenhausen
November 6, 2024
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Most Popular in Synthesis

 

A gloved hand holding a piece of glassware with a goldish yellow crystalline material inside.
Credit: Grant Wheeler

After many centuries of being valued for its constancy, gold has recently attracted attention for its reactivity and catalytic power. Often, the first step in unlocking the chemistry of gold is oxidizing it so that gold ions can dissolve. Of course, garden-variety acids won’t do, so Grant Wheeler, a student at Olivet Nazarene University, used aqua regia. This caustic mixture of concentrated nitric and hydrochloric acids reacts with gold to form chloroauric acid, a crystalline starting material (shown here) for gold nanoparticles and inorganic compounds. 

Submitted by Grant Wheeler

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Chemical & Engineering News
ISSN 0009-2347
Copyright © 2024 American Chemical Society

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