👉👉❓♻️💯 Hello friend@MakeGold 👉 [ Ссылка ]
Usually we are familiar with gold in the form of jewelry and gold bars. Most people don't know that gold can come in liquid form. Sometimes you will be surprised this is it mud, not gold, or this is dirt colored like earth.
Gold is often used repeatedly. Cycle by service life Such as electronic equipment Old jewelry And various scrap gold from production
Today I will bring my friend to see the change of gold.

Gold purification Usually starting with nitric acid mixed with hydrochloric acid The usual ratio of acids is 3 parts hydrochloric acid to 1 part nitric acid, you can get Aqua Regia for making gold into a solution. Aqua regia is used to dissolve gold, platinum, and palladium.
The acid mixture is unstable, so it is usually prepared in small amounts and used immediately.

Do not store aqua regia. Aqua regia quickly loses it effectiveness due to oxidation of its reactive components. Mix a fresh solution for each use. Excess solutions should be neutralized with sodium bicarbonate.
Use sodium metabisulfite precipitate gold out of a aqua regia solution. You will get gold sludge powder looks like mud. Sodium metabisulfite (also known as sodium bisulfite) is an affordable and effective selective precipitant for gold. This chemical can recover up to 99.95% of pure gold when the precipitated gold is thoroughly rinsed. It works well even at room temperature.
I will show you the strange change of gold mud. Use sodium mixed with water slowly. added to the gold solution. You will see the formation of gold mud.
0:29 gold from production
0:36 nitric acid mixed with hydrochloric acid
0:47 aqua regia is used to dissolve gold
1:34 of pure gold when the precipitated gold
1:49 you will see the formation of gold mud

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