Preparation of Chloroauric Acid

Combine 3 g of gold, 20 mL of conc. HCl and 4 mL of conc. nitric acid, start heating the solution until all of the gold reacts. Remove the water with a vacuum desiccator.

Au + HNO3 + 4 HCl → HAuCl4 + NO + 2 H2O

Capture

The gold is reacting with the acids

sd

All of the gold has reacted with the acids

sf

The hydrated product

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