Chemical News and Journal of Industrial Science, Tomy 101-102Chemical news office., 1910 |
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Strona 3
... residue with am- monium sulphide to remove the tungsten and tin , and treated the residue with hot concentrated hydrochloric acid to dissolve the iron sulphide formed ; after filtering and washing he obtained the pure acids . Rose ...
... residue with am- monium sulphide to remove the tungsten and tin , and treated the residue with hot concentrated hydrochloric acid to dissolve the iron sulphide formed ; after filtering and washing he obtained the pure acids . Rose ...
Strona 4
... residues without loss , while it is necessary to open up the residue again if niobium and tantalum are both present and have to be separated . If , however , it is only a question of separating quanti- tatively from iron , this method ...
... residues without loss , while it is necessary to open up the residue again if niobium and tantalum are both present and have to be separated . If , however , it is only a question of separating quanti- tatively from iron , this method ...
Strona 13
... residue he calculated the total amount of titanic acid . Thus , while titanic acid alone on fusion with soda gives insoluble metatitanate , and niobic acid alone soluble niobate , even a small proportion of niobic acid is sufficient to ...
... residue he calculated the total amount of titanic acid . Thus , while titanic acid alone on fusion with soda gives insoluble metatitanate , and niobic acid alone soluble niobate , even a small proportion of niobic acid is sufficient to ...
Strona 18
... residue , through an ashless filter , catching the filtrate in a graduated 250 cc . flask . Wash carefully . The filter is ignited and weighed , and the percentage of insoluble matter , which is SiO2 , Al2O3 , Fe2O3 , calculated ...
... residue , through an ashless filter , catching the filtrate in a graduated 250 cc . flask . Wash carefully . The filter is ignited and weighed , and the percentage of insoluble matter , which is SiO2 , Al2O3 , Fe2O3 , calculated ...
Strona 26
... residue ignited , washed with water , and again ignited ; thus niobium pentoxide con- taining some titanium is obtained . To determine the titanium , another quantity of the fluoride double salt is dissolved in hydrochloric acid ...
... residue ignited , washed with water , and again ignited ; thus niobium pentoxide con- taining some titanium is obtained . To determine the titanium , another quantity of the fluoride double salt is dissolved in hydrochloric acid ...
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acetic acid action alcohol alkaline aluminium ammonia ammonium amount analysis apparatus atomic weight B.Sc barium boiling bromide calcium calculated carbon dioxide cent Chem chemical Chemistry chemists chloride colour comet compounds concentrated condensation containing copper crystalline D.Sc decomposed derivatives determination dilute dissolved distilled ether ethyl evaporated excess experiments filter filtrate flask formed formula gives gold grms heated hydrochloric acid hydrogen hydroxide invertase iodide iodine iron J. J. Thomson ketone liquid melting metal method mgrms mineral mixture molecular molecules muriatic niobic nitrate nitric acid obtained oxide oxidised oxygen paper perchloric acid permanganate phosphorus platinum potassium precipitate prepared present Prof pure quantity reaction reduced residue salt sample scandium silver phosphate Society sodium sodium carbonate soluble substance sugar sulphate sulphide sulphuric acid tantalic acid tantalum telluride tellurium temperature theory tion titanic acid titanium tube vanadium vapour washed ytterbium zinc