Chemical News and Journal of Industrial Science, Tomy 99-100Chemical news office., 1909 |
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Strona 1
... colour is indecisive , but the third fraction would seem to contain most of the niobic acid , as the white acid becomes of a bright yellow colour when ignited ; on cooling it becomes white again . This method does not free the metallic ...
... colour is indecisive , but the third fraction would seem to contain most of the niobic acid , as the white acid becomes of a bright yellow colour when ignited ; on cooling it becomes white again . This method does not free the metallic ...
Strona 16
... colour was seen , although in some cases the colour developed slowly and only after the lapse of a number of hours . That the colour was not due to the action of the water on the Jena glass was shown by the fact that no colour appeared ...
... colour was seen , although in some cases the colour developed slowly and only after the lapse of a number of hours . That the colour was not due to the action of the water on the Jena glass was shown by the fact that no colour appeared ...
Strona 24
... colour . The constitutional formula appears to be Cl2 ( ( H3N ) 5Co - NH2 . . . Co ( NH3 ) 5 Cl3 . These decam- mine salts show a remarkable resemblance in colour , and the way in which they separate from their solutions to the ...
... colour . The constitutional formula appears to be Cl2 ( ( H3N ) 5Co - NH2 . . . Co ( NH3 ) 5 Cl3 . These decam- mine salts show a remarkable resemblance in colour , and the way in which they separate from their solutions to the ...
Strona 33
... colour is confined to certain spots or nodes on the surface . The pink colour of the indicator is a proof of the presence of hydroxyl ions and thus indicates the negative poles . Many persons who are interested in the metallurgical ...
... colour is confined to certain spots or nodes on the surface . The pink colour of the indicator is a proof of the presence of hydroxyl ions and thus indicates the negative poles . Many persons who are interested in the metallurgical ...
Strona 54
... colour tests for members of this group . Liebermann's reaction is characterised by the violet colour produced when a drop of strong sulphuric acid is added to a solution of the sub- stance in acetic anhydride . This test is best ...
... colour tests for members of this group . Liebermann's reaction is characterised by the violet colour produced when a drop of strong sulphuric acid is added to a solution of the sub- stance in acetic anhydride . This test is best ...
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