Chemical News and Journal of Industrial Science, Tomy 119-120Chemical news office., 1919 |
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Strona 21
... oxides were light yellowish brown , and about the same colour . ( b ) Very dark brown oxide . Atomic Weight of Original 98.94 Ho 1 2 3 Atomic Weights 110 106 102 98 Nd 94 90 5 6 The eighth fraction , Table V. , Fig . 5 , showed a sudden ...
... oxides were light yellowish brown , and about the same colour . ( b ) Very dark brown oxide . Atomic Weight of Original 98.94 Ho 1 2 3 Atomic Weights 110 106 102 98 Nd 94 90 5 6 The eighth fraction , Table V. , Fig . 5 , showed a sudden ...
Strona 28
... oxides to the litre . Two portions of this solution , of five litres each , were used for the electrolyses . The ... oxide method . The absorption spectrum of each fraction was studied with the aid of a Krüss spectro- scope , and the ...
... oxides to the litre . Two portions of this solution , of five litres each , were used for the electrolyses . The ... oxide method . The absorption spectrum of each fraction was studied with the aid of a Krüss spectro- scope , and the ...
Strona 29
... oxides a neutral solution of the nitrates was pre- pared . The concentration of the solution was then deter- mined by precipitation with oxalic acid and ignition of the Pptd . by oxalic acid oxalate to oxide . 7'4 7.6 Ampere weight . oxides ...
... oxides a neutral solution of the nitrates was pre- pared . The concentration of the solution was then deter- mined by precipitation with oxalic acid and ignition of the Pptd . by oxalic acid oxalate to oxide . 7'4 7.6 Ampere weight . oxides ...
Strona 30
... oxide and 85 grms . of the oxides of the rare earths ( av . at . wt . 1405 ) was electrolysed with a current of one ampere . The mercury cathode was vigorously stirred during the electrolysis and the concentration of the acid in the ...
... oxide and 85 grms . of the oxides of the rare earths ( av . at . wt . 1405 ) was electrolysed with a current of one ampere . The mercury cathode was vigorously stirred during the electrolysis and the concentration of the acid in the ...
Strona 69
... oxide and germanium oxide , was placed , and in our experiments about 5 cc . of a 10 per cent solution of potassium dichromate , together with a few drops of sul- phuric acid . This mixture was then warmed for about a minute , when the ...
... oxide and germanium oxide , was placed , and in our experiments about 5 cc . of a 10 per cent solution of potassium dichromate , together with a few drops of sul- phuric acid . This mixture was then warmed for about a minute , when the ...
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