Arsine
Gutzeit test
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===Gutzeit test=== |
===Gutzeit test=== |
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A characteristic test for arsenic involves the reaction of AsH3 with Ag+, called the Gutzeit test for arsenic |
A characteristic test for arsenic involves the reaction of AsH3 with Ag+, called the [[Gutzeit test]] for arsenicKing, E. J. (1959) ''Qualitative Analysis and Electrolytic Solutions'' Harcourt, Brace, and World; New York (see [[Sanger–Black apparatus]] for more). Although this test has become obsolete in [[analytical chemistry]], the underlying reactions further illustrate the affinity of AsH3 for "soft" metal cations. In the Gutzeit test, AsH3 is generated by reduction of aqueous arsenic compounds, typically [[arsenite]]s, with Zn in the presence of H2SO4. The evolved gaseous AsH3 is then exposed to AgNO3 either as powder or as a solution. With solid AgNO3, AsH3 reacts to produce yellow Ag4AsNO3, whereas AsH3 reacts with a solution of AgNO3 to give black Ag3As. |
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===Acid-base reactions=== |
===Acid-base reactions=== |
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