Silver nitrate, reagent

It is preferable to use Tollen s ammoniacal silver nitrate reagent, which is prepared as follows Dissolve 3 g. of silver nitrate in 30 ml. of water (solution A) and 3 g. of sodium hydroxide in 30 ml. of water (solution B). When the reagent is requir, mix equal volumes (say, 1 ml.) of solutions A and JB in a clean test-tube, and add dilute ammonia solution drop by drop until the silver oxide is just dissolved. Great care must be taken in the preparation and use of this reagent, which must not be heated. Only a small volume should be prepared just before use, any residue washed down the sink with a large quantity of water, and the test-tubes rinsed with dilute nitric acid. 

Potassium Pemxodisu(fate-Silver Nitrate Reagent... 

Transfer 150 ml of the silver nitrate reagent to each of two 250-ml glass-stoppered Erlenmeyer flasks. Place the flasks in a suitable ice bath until, die temperature of the contents Is 32°to 39.2 F (0° to 4°C). Add 7 to 9 drops of the mixed indicator to each flask and, if necessary, neutralize to a gray-green color with 0.02N sodium hydroxide if. acid or with 0.02N nitric acid if alkaline. Reserve one of the flasks for the blank and into the second flask pour 0 ml of propellant. Compare the color of the sample with that of the blank. A purple color in the sample solution indicates... 

Thoria catalyst, 735 Tischenko reactions, 318 Tollen s ammoniacal silver nitrate reagent, 330, 1061, 1074 p-Tolualdehyde, 689, 697 o-Toluamide, 798 Toluene, 510, 516, 615 purification of, 173, 174 separation from benzene, 231 p-Toluenesulphinic acid, 821, 826 o-Toluenesulphonamide, 821, 824 p-Toluenesulphonamide, 820, 823 p-Toluenesulphonates, 422, 437, 650, 684 ... 

Somebody gave you a sample of water from the Dead Sea containing about 70 g/L NaCl. Could you measure this amount of NaCl in a 50-mL sample adding the same amount of silver nitrate reagent used in this experiment (5 mL 0.01 N) ... 

A better procedure is to employ the technique described under the man-ganese(II) nitrate-silver nitrate reagent in reaction 9 below. A drop of Nessler s solution is placed on the glass knob of the apparatus. After the reaction is complete, the drop of the reagent is touched with a piece of drop-reaction or quantitative filter paper when a yellow colouration will be apparent. 

An alternative method for carrying out the test is to employ the manganese(II) nitrate-silver nitrate reagent. Upon treating a neutral solution of manganese(II) and silver salts with ammonia, a black precipitate is formed ... 

The manganese(II) nitrate-silver nitrate reagent is prepared thus dissolve 2-87 g manganese(II) nitrate in 40 ml water, and filter. Add a solution of 3-55 g silver nitrate in 40 ml water, and dilute the mixture to 100 ml. Neutralize the acid formed by hydrolysis by adding dilute alkali dropwise until a black precipitate is formed and filter. Keep the reagent in a dark bottle. 

Diamm ineargentato nitrate (ammoniacal silver nitrate) reagent This reagent reacts with neutral solutions of cerium(III) salts to form cerium(IV) hydroxide and metallic silver [difference from cerium(IV)] the former is coloured black by the finely divided silver ... 

Manganese(II) nitrate-silver nitrate-potassium fluoride reagent. To 100 ml manganese ) nitrate-silver nitrate reagent add a solution of 3-5 g potassium fluoride in 50 ml water. Boil, filter off the dark precipitate in cold, and use the clear solution for the tests. 

Detection Dipping into silver nitrate reagent followed by exposure to UV light dark brown spots on a white background, sensitivity 25-100 ng. 

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