Step 10: Testing your solution for gold.
Ok, this is the exciting part and one where you get to see some real chemistry at work..
you will need:
Stannous cloride created earlier, 1 coffee filter paper, 2 pipettes or glass droppers.
Simply place 1 dot of recovered solution on a piece of filer paper, Next place one drop of your stannous cloride on the other. The resulting reaction should turn purple.
If your did CONGRADS you have created AURIC Cloride Or Aucl3 a gold bearing solution. If your test drop didnt turn purple, add a little more tin to your stannous cloride and heat gently with a alcohol burner and BOROsiicate test tube. Repeat Test.
depending on how much gold is in your solution it may appear black.