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Aqua regia (/ ˈ r eɪ ɡ i ə, ˈ r iː dʒ i ə /; from Latin, lit. "regal water" or "king's water") is a mixture of nitric acid and hydrochloric acid, optimally in a molar ratio of 1:3. Aqua regia is a yellow-orange (sometimes red) fuming liquid, so named by alchemists because it can dissolve the noble metals, gold and platinum, though not all metals.

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20-05-2009· Aqua Regia dissolves Gold - Periodic Table of Videos - Duration: 5:16. Periodic Videos 905,935 views. 5:16. Making Colloidal Gold by Low Voltage Electrolysis - Duration: 7:01.

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