Ammonia Ammonium ion

S< dium Aluminato. . Ammonium Alum. . rola.uium Alum. . . Ammonia. . Ammonium (Ion). . Ammonium Chloride Ammonium Hydroxide Ammonium Sulfale... 

Ammonia, ammonium hydroxide, ammonia water (aqua ammonia), ammonium ion, ammonium salts. The Haber process and the cyanamide process of making ammonia. 

Figure 11-5 shows plots of calculated titration curves of 10 M nickel(II), iron(III), and calcium(II) at various pH values in buffers of ammonia-ammonium ion at a total buffer concentration of 0.1 M. Before the end point, the nickel curves at... 

Write the equilibrium equation and the equilibrium constant expression for an ammonia-ammonium ion buffer solution. 

There are tests that measure ammonia/ammonium ion in blood and urine however, these tests would probably not tell you whether you have been exposed because ammonia is normally found in the body. If you were exposed to harmful amounts of ammonia, you would notice it immediately because of the strong, unpleasant, and irritating smell, the strong taste, and because of skin, eye, nose, or throat irritation. Exposure detection levels and methods for determining ammonia levels in biological materials are discussed in Chapters 3 and 7. 

In water, ammonia is in equilibrium with the ammonium ion, NH/. The ammonia-ammonium ion equilibrium is highly dependent on the pH and, to a lesser extent, the temperature of the medium. In acidic waters, the equilibrium favors the ammonium ion. 

PAL/TAL both belong to the L-amino acid ammonia lyase family, which catalyzes the formation of various a,/3-unsaturated acids by elimination of ammonia (ammonium ion) from the corresponding L-ct-amino acids. This family of proteins includes aspartate ammonia lyase (AAL), methylaspartate ammonia lyase (MAL), HAL,... 

Figure 7 pH dependence of conditional stability constants, of some analytically important EDTA-metal complexes. The dashed line indicates the effect of 1 mol I ammonia/ammonium ion buffer on the conditional constants of the Zn-EDTA complex. 

Which buffer system will have the greatest buffer capacity at pH 9.0 (i) dimethylamine/dimethylammonium ion, (ii) ammonia/ammonium ion, (iii) hydroxylamine/ hydroxylammonium ion, (iv) 4-nitrophenol/4-nitrophenolate ion ... 

The formation of (II) provides a quite selective spot test for palladium. Gold must be removed prior to the test because it will cause the development of a deep ruby red in the spot plate test and a diffused violet spot on the paper, apparently due to the reduction of the gold ions to the colloidal metal. Interference may also arise from 0s04 , Os+, Ru+, and RuCle ions because they have distinct self-colors. Mercurous ion causes partial interference by the reduction of part of the palladium to the elementary state, but a positive response can still be seen. It is possible to detect I part of palladium in the presence of 200 parts of platinum or 100 parts of rhodium. Less favorable ratios should be avoided because of the color of these salts. No interference is caused by mercuric and iridic chloride, but free ammonia, ammonium ions, stannous, cyanide, thiocyanate, fluoride, oxalate, and tetraborate ions do interfere. Lead, silver, ferrous, ferric, stannic, cobaltous, nickel, cupric, nitrite, sulfate, chloride, and bromide ions do not interfere. 

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