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Using Sodium Metabisulfite, to get gold settle as sediment at the bottom of the Aqua regia solution Archimedes Channel 2:39 5 years ago 97 580 Скачать Далее
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gold recovery aqua regia with sodium metabisulfite#miexperiment Mi experiment 1:20 2 years ago 1 366 Скачать Далее
FAIL! GOLD refining, precipitation with SMB gone wrong OwlTech 13:22 4 years ago 105 576 Скачать Далее
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Where did the gold disappear? don't make such mistakes!! GRH channel 1:20 1 year ago 4 322 Скачать Далее