how to dissolve silver in conc nitric acid
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Acids react with and dissolve most metals, but to achieve full dissolution, the resulting compounds must also exhibit solubility in water. Silver, for example, will dissolve in hydrochloric acid, or HCl, to form silver chloride, or AgCl. Silver chloride, however, is insoluble in water, which means a white solid of AgCl crystals will form in the resulting solution. The full dissolution of silver requires nitric acid, or HNO3, which reacts with silver to form silver nitrate, a water-soluble compound.
Put on rubber gloves pour 2 ounces of distilled water into a glass measuring cup. Add 1 ounce of concentrated nitric acid to the distilled water to bring the total volume to 3 oz.
Transfer the nitric acid solution from the measuring cup to a small glass container, such as an empty baby-food jar.
Place the jar containing the nitric acid solution in a well-ventilated area. Add the sample of silver to the jar and then stand away from the jar while the silver dissolves. The reaction of the nitric acid and silver produces choking orange nitric oxide fumes. Do not inhale these fumes or allow them to contact your eyes.
Gently swirl the solution after the production of orange fumes has subsided. Continue to periodically swirl the solution until all of the silver has dissolved. For small samples of silver, the process should only require a few minute
Warning
Nitric acid is corrosive to skin. Wear gloves and eye protection any time you handle concentrated acids. Do not allow nitric acid to contact bare skin and do not allow its fumes to contact your eyes or mucous membranes. Prior to using nitric acid, familiarize yourself with its hazards by reading the material safety data sheet provided in the Resources.
Silver nitrate will stain skin and clothing.
Acids react with and dissolve most metals, but to achieve full dissolution, the resulting compounds must also exhibit solubility in water. Silver, for example, will dissolve in hydrochloric acid, or HCl, to form silver chloride, or AgCl. Silver chloride, however, is insoluble in water, which means a white solid of AgCl crystals will form in the resulting solution. The full dissolution of silver requires nitric acid, or HNO3, which reacts with silver to form silver nitrate, a water-soluble compound.
Put on rubber gloves pour 2 ounces of distilled water into a glass measuring cup. Add 1 ounce of concentrated nitric acid to the distilled water to bring the total volume to 3 oz.
Transfer the nitric acid solution from the measuring cup to a small glass container, such as an empty baby-food jar.
Place the jar containing the nitric acid solution in a well-ventilated area. Add the sample of silver to the jar and then stand away from the jar while the silver dissolves. The reaction of the nitric acid and silver produces choking orange nitric oxide fumes. Do not inhale these fumes or allow them to contact your eyes.
Gently swirl the solution after the production of orange fumes has subsided. Continue to periodically swirl the solution until all of the silver has dissolved. For small samples of silver, the process should only require a few minute
Warning
Nitric acid is corrosive to skin. Wear gloves and eye protection any time you handle concentrated acids. Do not allow nitric acid to contact bare skin and do not allow its fumes to contact your eyes or mucous membranes. Prior to using nitric acid, familiarize yourself with its hazards by reading the material safety data sheet provided in the Resources.
Silver nitrate will stain skin and clothing.
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The full dissolution of silver requires nitric acid, or HNO3, which reacts with silver to form silver nitrate, a water-soluble compound. Put on rubber gloves pour 2 ounces of distilled water into a glass measuring cup. Add 1 ounce of concentrated nitric acid to the distilled water to bring the total volume to 3 oz.
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