Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

X Ag2

Dithiomalonamide, and dimethyl and diphenyl derivatives, (Hdmta) form complexes [Ag(Hdmta)X], [Ag2(Hdmta)3X2] (X = Cl, Br, I, CIO4, or BF4), [Ag2 (HMe2dmta)l2], [Ag3(HPh2dmta)2 Br2] which have been shown to be S,N-co-ordinated. ... [Pg.389]

Other useful solid-state electrodes are based on silver compounds (particularly silver sulfide). Silver sulfide is an ionic conductor, in which silver ions are the mobile ions. Mixed pellets containing Ag2S-AgX (where X = Cl, Br, I, SCN) have been successfiilly used for the determination of one of these particular anions. The behavior of these electrodes is determined primarily by the solubility products involved. The relative solubility products of various ions with Ag+ thus dictate the selectivity (i.e., kt] = KSp(Agf)/KSP(Aw)). Consequently, the iodide electrode (membrane of Ag2S/AgI) displays high selectivity over Br- and Cl-. In contrast, die chloride electrode suffers from severe interference from Br- and I-. Similarly, mixtures of silver sulfide with CdS, CuS, or PbS provide membranes that are responsive to Cd2+, Cu2+, or Pb2+, respectively. A limitation of these mixed-salt electrodes is tiiat the solubility of die second salt must be much larger than that of silver sulfide. A silver sulfide membrane by itself responds to either S2- or Ag+ ions, down to die 10-8M level. [Pg.159]

De Marco R, Pejcic B, Prince K, van Riessen A (2003) A multi-technique surface study of the mercury(ll) chalcogenide ion-selective electrode in saline media. Analyst 128 742-749 Pejcic B, De Marco R (2004) Characterization of an AgBr-Ag2S-As2S3-Hgl2ion-selective electrode membrane a X-ray photoelectron and impedance spectroscopy approach. Appl Surf Sci 228 378-400... [Pg.348]

Some MIECs exhibit metallic properties. These materials can have different concentration of the mobife ioiflc species, compared with that of electrons and holes. Silver chalcogenides, Ag2+sX (X = S, Se, or Te) is an example of a metallic MIEC that conduct electrons and silver ions. These materials are good electronic conductors (close to metallic) and show interesting electronic behavior as a function of temperature as... [Pg.436]

See other pages where X Ag2 is mentioned: [Pg.58]    [Pg.382]    [Pg.471]    [Pg.270]    [Pg.1186]    [Pg.209]    [Pg.58]    [Pg.382]    [Pg.471]    [Pg.270]    [Pg.1186]    [Pg.209]    [Pg.732]    [Pg.725]    [Pg.1187]    [Pg.640]    [Pg.283]    [Pg.459]    [Pg.92]    [Pg.92]    [Pg.104]    [Pg.342]    [Pg.1310]    [Pg.1344]    [Pg.1348]    [Pg.42]    [Pg.34]    [Pg.281]    [Pg.128]    [Pg.139]    [Pg.78]    [Pg.402]    [Pg.402]    [Pg.81]    [Pg.917]    [Pg.918]    [Pg.922]    [Pg.927]    [Pg.930]    [Pg.931]    [Pg.932]    [Pg.948]    [Pg.949]    [Pg.954]    [Pg.956]    [Pg.958]    [Pg.963]    [Pg.968]    [Pg.973]    [Pg.978]    [Pg.983]    [Pg.988]    [Pg.1016]   
See also in sourсe #XX -- [ Pg.2 , Pg.9 , Pg.364 , Pg.366 ]



SEARCH



© 2019 chempedia.info