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Precipitated Silver: Silver Chloride Reduced by Zinc in Acidulated Water (Thorpe 1913)
Fine silver powder without melting anything. Hydrochloric acid throws silver out of solution as white silver chloride. Zinc in slightly acid water then takes the chlorine away and leaves the silver as a grey powder.
Source: Thorpe, Dictionary of Applied Chemistry, vol. 4 (1913), Silver. Thorpe gives no amounts, times or end-point. Ours: a silver nitrate solution, zinc sheet strips, hydrochloric acid of the two acids he names, and the washing and drying. Picture drawn by Youblob.
Baguhan
1 day
Mga Tagubilin
1
1
Dissolve silver nitrate in water
Dissolve silver nitrate in water
Ours: dissolve silver nitrate in distilled water as the silver solution. Silver nitrate stains and burns skin: gloves and goggles.
Mga materyales para sa hakbang na ito:
Silver Nitrate1 as required
Distiladong Tubig1 as requiredMga kailangang kasangkapan:
Basong Borosilikato
Baras na Salaming Borosilicate
Gwantes na Nitrile
Salamin Laban sa Tilamsik ng Kemikal2
2
Throw down silver chloride with hydrochloric acid
Throw down silver chloride with hydrochloric acid
Add hydrochloric acid to the solution. White silver chloride falls. Ours: add it while it still makes a precipitate, let it settle and pour off the liquid.
Mga materyales para sa hakbang na ito:
Hydrochloric acid1 as requiredMga kailangang kasangkapan:
Basong BorosilikatoBaras na Salaming BorosilicateGwantes na NitrileSalamin Laban sa Tilamsik ng Kemikal3
3
Reduce the chloride with zinc in acid water
Reduce the chloride with zinc in acid water
Cover the chloride with water made slightly acid with hydrochloric acid (Thorpe: hydrochloric or sulphuric) and put zinc in it. The zinc reduces the chloride to silver. Ours: strips of zinc sheet, left in until no white chloride is left. Time not given.
Mga materyales para sa hakbang na ito:
Lapad na sink1 as requiredHydrochloric acid1 as requiredDistiladong Tubig1 as requiredMga kailangang kasangkapan:
Basong BorosilikatoBaras na Salaming BorosilicateGwantes na NitrileSalamin Laban sa Tilamsik ng Kemikal4
4
Take out the zinc, wash and dry the silver
Take out the zinc, wash and dry the silver
Ours: lift out what is left of the zinc, wash the grey silver powder with water until the washings are no longer acid, filter, and dry it. Keep it in a closed jar.
Mga kailangang kasangkapan:
Distiladong Tubig
Papel na Pansala
Hurnong pantuyo
Garapong SalaminMga Materyales
4- 1 as requiredPlaceholder
- 2 as requiredPlaceholder
- 2 as requiredPlaceholder
- 1 as requiredPlaceholder
Mga Kinakailangang Kasangkapan
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