When silver reacts with nitric acid (HNO3) silver nitrate
is formed. It is very easy to recover silver metal from silver nitrate (AgNo3).
First filter the silver nitrate solution, so that all the unwanted material is
removed from it and we get a better quality of silver. Take a plastic pot and
pour all the silver nitrate into it. Now start adding HCL (Hydrochloric Acid)
to it in small increments. The moment you add HCL to silver nitrate solution,
silver starts separating from it in the form of silver chloride. Keep adding
HCL to the solution till there is no more silver separating from silver nitrate
solution.
Silver chloride (AgCl) is a curd like silver compound in
appearance. It precipitates immediately. Give it around half an hour to settle
to the bottom completely. Heavier particles settle immediately and lighter ones
take some time to go to the bottom. After that, separate the liquid from the
silver chloride by tilting the pot. Wash the silver chloride with plain water
at least twice. Now dissolve some glucose into the plain water and keep it in a
plastic can. Add some quantity of this glucose water to silver chloride. And stir
around the silver chloride with some glass rod. Silver chloride will start converting
to metallic silver. Keep doing it slowly till all the silver chloride has changed
into silver. Now put this silver onto a filter paper or filter cloth so that
all the water should filter out of it. You can leave it for a night. By the
morning, there will be no or little moisture left in the silver. You can dry it
on a lighter flame in a glass pot and melt it.
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