China Wholesale for Tee valve fitler unit to Colombia Factories
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Our personnel are always in the spirit of "continuous improvement and excellence", and together with the top-quality good quality solutions, favorable selling price and superior after-sales providers, we try to acquire each customer's rely on for China Wholesale for Tee valve fitler unit to Colombia Factories, The product will supply to all over the world, such as: Macedonia , Czech republic , European , In order to meet more market demands and long-term development, a 150, 000-square-meter new factory is under construction, which will be put into use in 2014. Then, we shall own a large capacity of producing. Of course, we will continue improving the service system to meet the requirements of customers, bringing health, happiness and beauty to everyone.
In this video we make gold by reduction of chloroauric acid with sodium metabisulfite.
4 grams of sodium metabisulfite is dissolved in 10mL of water.
About 2mL of water is added to 2.6g chloroauric acid to dissolve it. Now the sodium metabisulfite is added in drop by drop.
The sodium metabisulfite is reacts with the chloroauric acid to produce elemental gold, hydrochloric acid and sodium bisulfate. That brown precipitate you’re seeing is actually the gold. It doesn’t look like common gold because the particles of gold produced here are so small and rough that they don’t reflect light in the way smooth bulk gold does. Just like how very fine sand is dull but glass is clear and shiny.
The gold dust is filtered and washed with water and then melted down into gold nuggets.
By Eleanore from Belgium - 2016.05.02 18:28
Product variety is complete, good quality and inexpensive, the delivery is fast and transport is security, very good, we are happy to cooperate with a reputable company!
By Olivia from Algeria - 2016.09.16 13:44