This is a possible concise summary:
The text is a transcript of a video where the narrator shows how to extract gold from different sources of electronic waste. He explains the steps and the chemistry involved in dissolving, filtering, precipitating and melting the gold. He also compares the yield and the cost of the process and concludes that it is not very profitable unless done in large quantities and with cheap materials. He also thanks his supporters on Patreon and mentions his future plans for his channel.
Here are the key facts extracted from the text:
1. The narrator purchased 200 RAM trimmings for processing.
2. The narrator used a mixture of hydrogen peroxide and hydrochloric acid to soak the RAM trimmings.
3. The narrator added 250 milliliters of peroxide and then topped it off with hydrochloric acid.
4. The narrator let the mixture sit for about a week.
5. The narrator repeatedly wet the RAM trimmings with a spray bottle and shook them to dislodge loose gold.
6. The narrator performed a secondary washing to separate the gold.
7. The narrator used a coffee filter to separate the gold from the liquid.
8. The narrator used hydrochloric acid and bleach to dissolve the gold.
9. The narrator added sodium metabisulfite to the solution to precipitate the gold.
10. The narrator used a stannous chloride test to detect the presence of gold.
11. The narrator precipitated the gold using sodium metabisulfite.
12. The narrator filtered the solution using a coffee filter.
13. The narrator washed the filter paper and beaker with water to remove any remaining gold.
14. The narrator melted the gold using a melting dish and a torch.
15. The narrator used borax as a flux to prevent the gold from sticking to the dish.
16. The narrator cooled the gold button in water.
17. The narrator calculated the yield of gold from each source.
18. The narrator got 0.76-0.78 grams of gold from the RAM trimmings.
19. The narrator spent $85 Canadian for the RAM trimmings and $40 for the miscellaneous PCBs.
20. The narrator calculated that the cost of the gold was about $121 per gram using the RAM trimmings and $160 per gram using the PCBs.
21. The narrator found that one metric tonne of e-waste can yield between 300-400 grams of gold.
22. The narrator processed 472 grams of PCBs and got 0.18 grams of gold, which falls within the expected range.
23. The narrator got about $11 worth of gold from a little over a pound of PCBs.