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Metatungstates

Alkali-immobile dye-releasing quinone compounds, 19 293-294 Alkali lignins, 15 19-20 Alkali manganate(VI) salts, 15 596 Alkali manganates(V), 15 592 Alkali-metal alkoxide catalysts, 10 491 Alkali-metal alkoxides, effects of, 14 252 Alkali-metal alkylstannonates, 24 824 Alkali-metal fluoroxenates, 17 329-330 Alkali-metal hydrides, 13 608 Alkali-metal hydroxides, carbonyl sulfide reaction with, 23 622 Alkali-metal metatungstates, 25 383 Alkali-metal perchlorates, 18 211 Alkali-metal peroxides, 16 393... [Pg.29]

Ammonium magnesium fluoride, 15 396 Ammonium metatungstates, 25 383 uses for, 25 388... [Pg.51]

Fig. 21. Polyhedral representation of the a- and /3-Keggin structures of [(H2)Wi2 O40]6, also known as metatungstate and tungstate X respectively. The numbers show where the W30i3 unit (60° rotation involved) is attached to build the structures. Fig. 21. Polyhedral representation of the a- and /3-Keggin structures of [(H2)Wi2 O40]6, also known as metatungstate and tungstate X respectively. The numbers show where the W30i3 unit (60° rotation involved) is attached to build the structures.
The preference of the vanadium atoms to be mutual adjacent is confirmed by a range of a-Keggin ions with vanadium occupying the center (172). A metatungstate Keggin ion, a-[H2WnVO40]7, with one... [Pg.174]

Salts of Molybdic and Tungstic Acids. What types of salts of molybdic and tungstic acids exist Give examples of isopoly- and heteropoly molybdenum and tungsten compounds. What is the composition of para- and metamolybdates and of para- and metatungstates Which molybdates and tungstates dissolve poorly in water ... [Pg.219]

Preparation of Sodium Metatungstate. Place a porous clay cylinder playing the role of a diaphragm and anode vessel into a thick-walled glass beaker (Fig. 129). Pour 300 ml of a 0.1 N sodium hydroxide solution into the glass beaker, and a solution containing... [Pg.229]

Conduct electrolysis until the pH of the solution in the anode compartment becomes equal to 3 take samples every hour. Check the completeness of converting the tungstate into the metatungstate by means of the Scheele reaction. To do this, add 1 ml of concentrated hydrochloric acid dropwise to 5 ml of a sample. The absence... [Pg.230]

The initially formed product in tungstate solutions acidified to H+/W04 = 1.5 is so-called pseudometatungstate anion (%p) which has to date been isolated in noncrystalline form only, but which has a characteristic polarogram. Solutions of ip are slowly converted successively to j8 and a isomers of the metatungstate anion [(tyW O ]6-. At 80 °C and pH 3 the half-lives of both processes are 70 min.48... [Pg.1034]

Compounds containing fluoride ions in metatungstate have been synthesized (27) (A) (Wl2F2038H2)H4, (B) (Wi2F3037H)H4, (C) (W12038F2H)H5, and (D) (W12039FH2)H5, where the central atoms are protons. [Pg.121]

See other pages where Metatungstates is mentioned: [Pg.289]    [Pg.291]    [Pg.1012]    [Pg.1014]    [Pg.1015]    [Pg.297]    [Pg.164]    [Pg.269]    [Pg.271]    [Pg.274]    [Pg.534]    [Pg.544]    [Pg.394]    [Pg.571]    [Pg.162]    [Pg.162]    [Pg.162]    [Pg.167]    [Pg.168]    [Pg.168]    [Pg.170]    [Pg.21]    [Pg.204]    [Pg.54]    [Pg.183]    [Pg.230]    [Pg.230]    [Pg.1023]    [Pg.1033]    [Pg.1033]    [Pg.1034]    [Pg.1034]    [Pg.1050]    [Pg.51]    [Pg.88]    [Pg.178]    [Pg.231]    [Pg.129]    [Pg.148]    [Pg.179]   
See also in sourсe #XX -- [ Pg.1034 ]

See also in sourсe #XX -- [ Pg.233 , Pg.234 , Pg.235 , Pg.236 , Pg.237 , Pg.238 , Pg.239 , Pg.240 , Pg.241 ]

See also in sourсe #XX -- [ Pg.3 , Pg.1034 ]

See also in sourсe #XX -- [ Pg.1727 ]

See also in sourсe #XX -- [ Pg.133 , Pg.145 ]



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Ammonium Metatungstate (AMT)

Ammonium metatungstate

Ammonium metatungstate hydrate

Barium metatungstate

Metatungstates isomers

Sodium metatungstate

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