💎Gold bars can be repurposed into high purity gold powder through re-purification.
🔬The re-purification process involves dissolving gold bars in hydrochloric acid and nitric acid.
🧪Impurities are separated from the gold solution using precipitation techniques.
💧Sodium metabisulfite is used to precipitate the gold as a powder.
🚿The gold powder is rinsed multiple times to remove excess chemicals and collect the purified gold.
What is the purpose of re-purifying gold bars?
—The purpose of re-purifying gold bars is to obtain high purity gold powder that can be used in various applications.
What chemicals are used in the re-purification process?
—Hydrochloric acid and nitric acid are used to dissolve the gold bars, and sodium metabisulfite is used to precipitate the gold as a powder.
How are impurities separated from the gold solution?
—Impurities are separated from the gold solution through precipitation techniques, where the impurities are left behind as solids while the gold remains in solution.
Why is rinsing the gold powder important?
—Rinsing the gold powder is important to remove any remaining chemicals and impurities, ensuring the purity of the final product.
What can the purified gold powder be used for?
—The purified gold powder can be used in various applications, such as electronics, jewelry making, and scientific research.
00:08Introduction to the process of re-purifying gold bars into high purity gold powder.
00:23Placing gold ingots in a beaker and adding hydrochloric acid.
01:08Adding nitric acid to the gold solution to dissolve impurities.
02:55Using sodium metabisulfite to precipitate the gold as a powder.
05:38Observing the progress of the re-purification process.
06:57Determining the completion of the gold dissolution and precipitation.
08:08Verifying the presence of pure gold using a gold coin.
09:21Adding hydrochloric acid to neutralize excess nitric acid.
