weighting one kilogram gold-plated fingers
diluted nitric acid solution is added to the fingers
solution is left to simmer
couple of hours into the process and gold foils can be seen floating
the nitric solution is carefully decanted
hydrochloric acid and minute amount of nitric acid is added to the fingers
solution is left to simmer for an hour
aqua regia is decanted from the flask
not shown in the video but the solution was then treated with ferrous sulfate
the precipitate was then melted and the liquid was left to settle overnight.
On the next day the liquid was passed through the filter the filter paper was
dissolved in aqua regia
solution was then diluted with water three times its volume and filtered
ferrous sulfate was added to the solution
liquid was heated and gold left to settle
not shown in the video the resulting button weighted 1.5 grams
from one kilogram fingers I managed to recover two gold buttons weighing 4.7
and 1.5 grams
or that is 6.2 grams impure gold that needs to be refined further. Thanks for
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