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Primary standard silver nitrate

The importance of the determination of sulphuric acid and sulphates lies very largely in the fact that sulphur in various forms of combination, and also free sulphur, is frequently determined quantitatively by primary conversion into sulphuric acid or sulphate, followed by actual estimation in the latter form. For example, a convenient volumetric process applicable to the Carius method for determining sulphur in organic compounds is to neutralise the solution of sulphuric acid after removal of the excess of nitric acid by evaporation, and then add silver nitrate, by which the sulphate is converted into silver sulphate. This is separated from the excess of silver nitrate by means of its insolubility in alcohol, and is then estimated by dissolving in dilute nitric acid and titrating the silver with standard thiocyanate solution.3... [Pg.179]

After you prepared the silver carrier from a primary standard reagent of silver nitrate in Section A, you read on the label of the reagent container that the silver nitrate is 98.56% pure. How do you correct the carrier solution information on that basis ... [Pg.44]

Silver Nitrate, 0.1 N (16.99 g AgN03 per 1000 mL) Dissolve about 17.5 g of silver nitrate (AgN03) in 1000 mL of water, and standardize the solution as follows Weigh accurately 100 mg of primary standard sodium chloride, previously dried at 120° for 16 h, into a 150-mL beaker, and dissolve it in 5 mL of water. Add 5 mL of acetic acid, 50 mL of methanol, and 2 or 3 drops of Eosin Y TS, and titrate with the silver nitrate solution to the endpoint. Calculate the normality. [Pg.973]

Both silver nitrate and potassium thiocyanate are obtainable in primary-standard quality. The latter is, however, somewhat hygroscopic, and thiocyanate solutions are ordinarily standardized against silver nitrate. Both silver nitrate and potassium thiocyanate solutions are stable indefinitely. [Pg.362]

The primary standard for this method must be a sample of Eau de Mer Normale with a stated Cl%o value (approximating 19.38). To conserve this primary standard, it is best to prepare a large volume (10-20 liters) of a secondary standard consisting of filtered sea water (preferably collected below 50 m in the open ocean) with a chlorinity exceeding 18%o. This sample is stabilized by adding a few crystals of thymol and is then quickly put into sample bottles see Sect. D). Every tenth bottle is opened and analysed in duplicate by the method described below using a silver nitrate solution that has been standardized by Eau de Mer Normale. The mean of ten or more such duplicates is taken as the chlorosity (20 C) of the secondary standard. [Pg.13]

As noted in Table 1 of Topic A5, silver nitrate, sodium chloride and potassium chloride are primary standards for silver halide precipitation reactions. Other... [Pg.92]


See other pages where Primary standard silver nitrate is mentioned: [Pg.193]    [Pg.349]    [Pg.192]    [Pg.359]    [Pg.140]    [Pg.91]    [Pg.84]   
See also in sourсe #XX -- [ Pg.127 ]




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