Chemical News and Journal of Industrial Science, Tomy 105-106Chemical news office., 1912 |
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Strona 7
... separated fractions , the composition and properties of which are known but the identity of which has not as yet ... separation or isolation of organic compounds , for the most part shaking out with immiscible solvents and precipitating ...
... separated fractions , the composition and properties of which are known but the identity of which has not as yet ... separation or isolation of organic compounds , for the most part shaking out with immiscible solvents and precipitating ...
Strona 12
... separated by dissolving in hydro- fluoric acid , adding excess of KI , and subjecting the mix- ture to fractional crystallisation . To separate tantalic and niobic acids from titanic acid Knop's method is the best ; i.e. , the ...
... separated by dissolving in hydro- fluoric acid , adding excess of KI , and subjecting the mix- ture to fractional crystallisation . To separate tantalic and niobic acids from titanic acid Knop's method is the best ; i.e. , the ...
Strona 16
... separated by filtration and the alcohol removed from the filtrate by evaporation , the volume being kept constant by the addition of water . There was thus formed a reddish brown precipitate which after separation and washing was in the ...
... separated by filtration and the alcohol removed from the filtrate by evaporation , the volume being kept constant by the addition of water . There was thus formed a reddish brown precipitate which after separation and washing was in the ...
Strona 17
... separated by filtration . When so separated , washed , and dried it is in the form of resinous lumps or powder , varying in colour , melting - point , and composition with the soil from which it was obtained . 17 The substance so ...
... separated by filtration . When so separated , washed , and dried it is in the form of resinous lumps or powder , varying in colour , melting - point , and composition with the soil from which it was obtained . 17 The substance so ...
Strona 30
... separated layers contain both metals , no matter what the temperature , but the quantitative com- positions depend ... separation may depend on the rate of cooling . Our second case , that of chemical combination between the metals , is ...
... separated layers contain both metals , no matter what the temperature , but the quantitative com- positions depend ... separation may depend on the rate of cooling . Our second case , that of chemical combination between the metals , is ...
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