Chemical News and Journal of Industrial Science, Tomy 131-132Chemical news office., 1925 |
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Strona 2
... added with shaking through the wide tube . If the flask becomes warn to the touch it should be cooled by placing in ... adding small por- tions at a time and shaking between addi- tions . The final mixture is distilled with steam . The ...
... added with shaking through the wide tube . If the flask becomes warn to the touch it should be cooled by placing in ... adding small por- tions at a time and shaking between addi- tions . The final mixture is distilled with steam . The ...
Strona 7
... added or mechanical , moisture , as distinct from the natural moisture in the coal itself , and , of course , that obtained by chemical decompo- sition of the coal substance . Roughly speaking , average figures to - day at 9-12 ...
... added or mechanical , moisture , as distinct from the natural moisture in the coal itself , and , of course , that obtained by chemical decompo- sition of the coal substance . Roughly speaking , average figures to - day at 9-12 ...
Strona 15
... added to the raw materials for making aluminous cement to prevent the formation of silicates . The added substance may be hydrogen sulphide , sulphur , sulphides , hyposulphites , sulphites , sulphates , sulphur dioxide , sulphur ...
... added to the raw materials for making aluminous cement to prevent the formation of silicates . The added substance may be hydrogen sulphide , sulphur , sulphides , hyposulphites , sulphites , sulphates , sulphur dioxide , sulphur ...
Strona 18
... adding known amounts of lead in solution to 25 cc . of ammoniacal acetate . KCN is also added if used in the sample being analysed . 1 cc . of colourless ammonium sulphide is finally added , and the volume made up to 50 cc . Convenient ...
... adding known amounts of lead in solution to 25 cc . of ammoniacal acetate . KCN is also added if used in the sample being analysed . 1 cc . of colourless ammonium sulphide is finally added , and the volume made up to 50 cc . Convenient ...
Strona 19
... added to hold up copper , furthermore , causes a cloudiness with the HS reagents . Organic acids do not prevent the ... adding ammonium sul- phide . Aluminium . --The determination of lead in alum by direct extraction with ammon- iacal ...
... added to hold up copper , furthermore , causes a cloudiness with the HS reagents . Organic acids do not prevent the ... adding ammonium sul- phide . Aluminium . --The determination of lead in alum by direct extraction with ammon- iacal ...
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acid action addition amount appears application Association atoms becomes bismuth British carbon cent Chemical Chemistry coal complete compounds containing copper crystals determined direct effect electric electrode elements ENGINEERS experiments fact give given glass heat hydrogen important increase indicated industry Institute interest iron Laboratory lead less light lines liquid London manufacture Marks material matter means measured meeting Merton House metal method mineral Mines mixture nature Notes obtained Office oxide Patents physical plant possible Post Free precipitate prepared present production properties Published pure quantity reaction reference Research Royal Salisbury Square salts scientific shown Society sodium solution standard structure substance sulphur surface Table temperature theory tion tons Trade United various volume zinc