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2. Acid test - Wikipedia

   en.wikipedia.org/wiki/Acid_test

   An acid test is a qualitative chemical or metallurgical assay utilizing acid. Historically, it often involved the use of a robust acid to distinguish gold from base metals . Figuratively, the term represents any definitive test for attributes, such as gauging a person's character or evaluating a product's performance.

3. Touchstone (assaying tool) - Wikipedia

   en.wikipedia.org/wiki/Touchstone_(assaying_tool)

   This method has been used since ancient times. In modern times, additional tests can be done. The trace will react in different ways to specific concentrations of nitric acid or aqua regia, thereby identifying the quality of the gold: 24 karat gold is not affected but 14 karat gold will show chemical activity.

4. Acid Tests - Wikipedia

   en.wikipedia.org/wiki/Acid_Tests

   The name "Acid Test" was coined by Kesey, after the term "acid test" used by gold miners in the 1850s.He began throwing parties at his farm at La Honda, California. [2] The Merry Pranksters were central to organizing the Acid Tests, including Pranksters such as Lee Quarnstrom and Neal Cassady.

5. Metallurgical assay - Wikipedia

   en.wikipedia.org/wiki/Metallurgical_assay

   A model of a late 19th-century Canadian seal used to certify the quality of assayed gold. A metallurgical assay is a compositional analysis of an ore, metal, or alloy, usually performed in order to test for purity or quality. Some assay methods are suitable for raw materials; others are more appropriate for finished goods.

6. Analytical chemistry - Wikipedia

   en.wikipedia.org/wiki/Analytical_chemistry

   There are numerous qualitative chemical tests, for example, the acid test for gold and the Kastle-Meyer test for the presence of blood. Flame test

7. Our Editors Put Salicylic Acid Serums to the Test, and These ...

   www.aol.com/editors-put-salicylic-acid-serums...

   Salicylic Acid Serum 2%. Calling all folks with sensitive skin: This one's for you.The 2 percent salicylic acid in this one is backed by maltobionic acid, a PHA that gently dissolves dead skin ...

8. Aqua regia - Wikipedia

   en.wikipedia.org/wiki/Aqua_regia

   The reaction with hydrochloric acid is an equilibrium reaction that favors formation of tetrachloroaurate(III) anions. This results in a removal of gold ions from solution and allows further oxidation of gold to take place. The gold dissolves to become chloroauric acid. In addition, gold may be dissolved by the chlorine present in aqua regia.

9. Test your Paris 2024 knowledge and go for gold with this week ...

   www.aol.com/test-paris-2024-knowledge-gold...

   Test your knowledge and go for gold in this week’s Olympics quiz! Having trouble seeing the quiz? Use this link to see the quiz in new window. Editor’s note: The questions and answers in this ...