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How To Recover Silve From Silver Nitrate Solution?

02 21 10'

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In silver plating, how to recover silver form the waste solution

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Comments on: "How To Recover Silve From Silver Nitrate Solution?" (7)

  1. deansuba said:
    February 21, 2010 at 4:03 pm

    Add Sodium Chloride, maybe to 0.1 molar concentration to ppt out the Silver as Silver Chloride, centrifuge and wash ppt with water.

  2. sys said:
    February 21, 2010 at 4:23 pm

    Put a metal which has higher activity than Silver

  3. AbeLinco said:
    February 21, 2010 at 5:03 pm

    you might want to try electrolysis, Ag(NO3)2 will decompose very easily given the reactivity of silver

  4. some guy said:
    February 21, 2010 at 5:06 pm

    Typically, the recovery of silver from soluble silver salt is achieved by 2 steps. The first step is to isolate the silver from other impurities and the second one is to reduce the silver (ions) to metallic silver.
    The first step generally can be achieved by precipitating silver as their chloride salt, AgCl which is insoluble in water easily separated from the rest of the bulk soln.
    The precipitate is then washed with distilled water to remove impurities. The precipitate is then added to a dilute HCl solution with some zinc granules/ turnings/ dust.
    Zinc reacts with HCl forming nascent Hydrogen which reduces silver ion to silver metal. Silver powder/flakes formed can then be washed with dilute HCl (to remove traces of Zn) and finally rinsed with water and dried.
    Depending on the final use, the metal powder can then be melted in furnace to form bars or used for other purpose.

  5. ArcH said:
    February 21, 2010 at 5:40 pm

    Electrolysis.
    Electroplating is the process by which a metal in its ionic form is supplied with electrons to form a non-ionic coating on a desired substrate. The most common system involves: a chemical solution which contains the ionic form of the metal, an anode (positively charged) which may consist of the metal being plated (a soluble anode) or an insoluble anode (usually carbon, platinum, titanium, lead, or steel), and finally, a cathode (negatively charged) where electrons are supplied to produce a film of non-ionic metal.
    Electroplating involves the coating of an electrically conductive object with a layer of metal using electrical current. Usually, the process is used to deposit an adherent surface layer of a metal having some desired property (e.g., abrasion and wear resistance, corrosion protection, lubricity, etc.) onto a substrate lacking that property. It is also used to build up thickness on undersized parts.
    The process used in electroplating is called electrodeposition and is analogous to a galvanic or electrochemical cell acting in reverse. The part to be plated is the cathode of the circuit while anode is made of the metal to be plated on the part. Both of these components are immersed into a solution containing one or more metal salts as well as other ions that permit the flow of electricity. A rectifier supplies a direct current to the cathode causing the metal ions in solution to lose their charge and plate out on the cathode. As the electrical current flows through the circuit, the anode slowly dissolves and replenishes the ions in the bath.[1]
    On the contrary, other electroplating processes use a nonconsumable anode such as lead. In these situations ions of the metal to be plated must be periodically replenished in the bath as the plate forms out of the solution.[2]

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