Product Dose
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Silver Nitrate Helps to test Halogen Family Chlorine, Bromine and Iodine ions due to its characteristic change of colour as follows :::
Silver Nitrate + Chloride = White,
Silver Nitrate + Bromide = Pale Yellow,
Silver Nitrate + Iodide = Yellow.
Silver Nitrate also helps to find presence of Carbonate, Hydroxide, Sulfide and Phosphate ions.
For example: Pale Green=Carbonate, Brown=Hydroxide, Black=Sulfide.
Silver Nitrate is used in Oil Fields to determine the amount of Chloride ions in water and drilling fluids.
Preparation of 0.1M (0.1N) silver nitrate solution
AR silver nitrate has a purity of at least 99.9 per cent. Although an excellent primary standard it is still advisable to dry some finely powdered AgNO3 at 250 °C for 1–2 h, allowing to cool in a desiccator.
PROCEDURE
- 1.The molecular weight of AgNO3 is 169.876 (equivalent weight 169.876) and therefore 0.1M AgNO3 contains 16.9876 g per litre (in theory this weight should be multipled by the purity factor for AR silver nitrate, e.g. 1/0.999).
- 2.Weigh out accurately 8.4938 g dissolved in distilled water and transfer quantitatively to a 500 ml volumetric flask. Dilute to the mark and mix well.
Silver Nitrate crystal used in vacuum flask refill and mirror manufacture, silver plating, printing, corrosive agent in medicine, hair dye, analytical agent, preparation of other silver salt and colourfast ink.
ALWAYS dissolve Silver Nitrate powder into Distilled Water.
NEVER use Tap Water when dissolving Silver Nitrate powder – it will turn ‘milky’ (dilute Silver Chloride).
