Chemical News and Journal of Industrial Science, Tomy 111-112Chemical news office., 1915 |
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Strona 33
... solution of lead acetate is added , and the lead salt of catechol collected . The filtrate is acidified with sulphuric acid , extracted with ether , and the phenols are recovered by evaporating the dried ethereal solution . The residual ...
... solution of lead acetate is added , and the lead salt of catechol collected . The filtrate is acidified with sulphuric acid , extracted with ether , and the phenols are recovered by evaporating the dried ethereal solution . The residual ...
Strona 41
... solution and the chloride was precipitated , after consider able dilution , by pure hydrochloric acid gas . After the chloride had been many times washed and recrystallised from water , its aqueous solution was filtered through a Gooch ...
... solution and the chloride was precipitated , after consider able dilution , by pure hydrochloric acid gas . After the chloride had been many times washed and recrystallised from water , its aqueous solution was filtered through a Gooch ...
Strona 53
... solution is treated with a solution of stannous ehloride , a yellow precipitate of normal tin tungstate , SnWO4 , is formed , which is changed to the blue oxide of tungsten , W205 , on the addition of concentrated hydrochloric acid ...
... solution is treated with a solution of stannous ehloride , a yellow precipitate of normal tin tungstate , SnWO4 , is formed , which is changed to the blue oxide of tungsten , W205 , on the addition of concentrated hydrochloric acid ...
Strona 54
... solution of am- monium molybdate a brown precipitate appeared . This rapidly dissolved in the excess of the reagent , the solution assuming a characteristic orange colour , due to the reduc- tion of the MoO3 to Mo203 . This is very ...
... solution of am- monium molybdate a brown precipitate appeared . This rapidly dissolved in the excess of the reagent , the solution assuming a characteristic orange colour , due to the reduc- tion of the MoO3 to Mo203 . This is very ...
Strona 55
... solution was measured out and treated at variance with the usual experience of analysts of tung - with about 20 cc . of Mdivani's reagent . This gave rise sten compounds that it seemed very remarkable that the to an orange coloured solution ...
... solution was measured out and treated at variance with the usual experience of analysts of tung - with about 20 cc . of Mdivani's reagent . This gave rise sten compounds that it seemed very remarkable that the to an orange coloured solution ...
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