Russian Journal of Inorganic Chemistry, Tập 11,Phần 1British Library Lending Division with the cooperation of the Royal Society of Chemistry, 1966 |
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Trang 164
... niobium ions reaches a maximal value at a niobium concentration of 1 x 10-3 M in 4 M H2SO ; for higher niobium concentrations ( 2.5 x × 10-3-1 x 10-2 M ) the maximum value is reached in 6-8 M H2SO4 . Under these conditions the rate of ...
... niobium ions reaches a maximal value at a niobium concentration of 1 x 10-3 M in 4 M H2SO ; for higher niobium concentrations ( 2.5 x × 10-3-1 x 10-2 M ) the maximum value is reached in 6-8 M H2SO4 . Under these conditions the rate of ...
Trang 166
... niobium polyions . The figures in parentheses give the concentrations of niobium and acid ( M ) during the formation ( or decomposition ) of the polyions . solutions heated to boiling and then cooled before the addition of the reagent ...
... niobium polyions . The figures in parentheses give the concentrations of niobium and acid ( M ) during the formation ( or decomposition ) of the polyions . solutions heated to boiling and then cooled before the addition of the reagent ...
Trang 296
... Niobium hydroxide ages rapidly and then dissolves with difficulty in acids , so that it is very difficult to prepare a solution with a given concentration of niobium and acid . Thus the solutions with which we worked had different ...
... Niobium hydroxide ages rapidly and then dissolves with difficulty in acids , so that it is very difficult to prepare a solution with a given concentration of niobium and acid . Thus the solutions with which we worked had different ...
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acid solutions Akad alcohol alkali aluminium aluminium chloride amine analysis anion aqueous solutions bond boron trichloride boron trifluoride caesium calculated cation Chem chemical Chemistry chloride chromium(II cm-¹ Co(DH cobalt complex composition concentration coordination corresponding crystals curve decomposition decrease dehydration determined diagram diborane diglyme electrode enthalpies of dissolution equilibrium ether addition compound ethylenediamine europium eutectic extracting agent formed g-ion gadolinium germanium dioxide H₂O hafnium heated hydrates hydrochloric acid hydrogen hydroxide increase Inorg ions iron(III isothermal kcal Khim ligands melting metal method mixture mmoles molar mole molecules Moscow MZPC Nauk SSSR Neorg nickel niobium obtained optical density orthosilicate oxide potassium precipitate prepared PtCl pyrophosphate quantity ratio reaction reduction residue rubidium Russ salt shows sodium tetrahydroaluminate solubility solvents studied sulphate Table temperature ternary tetrahydrofuran thermal thiourea tion titration triammine uranium(IV values X-ray Zhur zirconium