Chemical News and Journal of Industrial Science, Tomy 101-102Chemical news office., 1910 |
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Strona 3
... addition of ammonium carbonate on ignition , in order thus to volatilise the sulphuric acid as ammonium sulphate . This method has , however , various disadvantages , for it is impossible , especially on stirring , to prevent the niobic ...
... addition of ammonium carbonate on ignition , in order thus to volatilise the sulphuric acid as ammonium sulphate . This method has , however , various disadvantages , for it is impossible , especially on stirring , to prevent the niobic ...
Strona 5
... addition of sulphurous acid is stopped before the precipitate balls together , the precipitation is not quantitative , the precipitate can never be filtered quantitatively , and the filtrate is always turbid . An unfailing sign of the ...
... addition of sulphurous acid is stopped before the precipitate balls together , the precipitation is not quantitative , the precipitate can never be filtered quantitatively , and the filtrate is always turbid . An unfailing sign of the ...
Strona 11
... addition of water and extraction with ether , the solution is washed , dried , and the ether distilled . Fractionation of the residual liquid gives ethyl a - hydroxyisobutyrate , boiling at 145-150 ° . After distillation over phosphoric ...
... addition of water and extraction with ether , the solution is washed , dried , and the ether distilled . Fractionation of the residual liquid gives ethyl a - hydroxyisobutyrate , boiling at 145-150 ° . After distillation over phosphoric ...
Strona 12
... addition to its normal valency of 1 . solution as compared with that dissolved by the soda melt. A chromogen has been isolnted from the body contents of the larva of Tenebro molitor , which gives with tyrosinase colour reactions ...
... addition to its normal valency of 1 . solution as compared with that dissolved by the soda melt. A chromogen has been isolnted from the body contents of the larva of Tenebro molitor , which gives with tyrosinase colour reactions ...
Strona 13
... addition of saltpetre consider- ably reduced the amount of titanium which went into A. Knop ( Ber . , 1887 , p . 1347 ) separated niobium and titanium as follows : -The mixture of acids or the finely powdered mineral was mixed with ...
... addition of saltpetre consider- ably reduced the amount of titanium which went into A. Knop ( Ber . , 1887 , p . 1347 ) separated niobium and titanium as follows : -The mixture of acids or the finely powdered mineral was mixed with ...
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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