Wednesday 1 February 2017

How to Recover Silver from Silver Nitrate Solution?

When silver reacts with nitric acid (HNO3), silver nitrate is formed. Silver metal can be easily recovered 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 fill it with all the silver nitrate. Now start adding HCL (hydrochloric acid) to it in small increments. The moment you add HCL to silver nitrate solution, silver begins to separate in the form of silver chloride. Keep adding HCL to the solution till there is no more silver separating from the 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, tilt the pot to separate the liquid from the silver chloride. At least twice, wash the silver chloride with plain water. Now dissolve some glucose in 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 a glass rod. Silver chloride will start converting to metallic silver. Keep doing it slowly until all the silver chloride has changed into silver. Now put this silver on a filter paper or filter cloth so that all the water should filter out of it. You can leave it for a night. By 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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