Chemical News and Journal of Industrial Science, Tomy 131-132Chemical news office., 1925 |
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Strona 17
... acid was riginally present in the residue . The sul- phate of lead , on the other hand , dissolved readily enough , although free sulphuric acid be present . It is only necessary to add an excess of ammonia before addition of ammonium ...
... acid was riginally present in the residue . The sul- phate of lead , on the other hand , dissolved readily enough , although free sulphuric acid be present . It is only necessary to add an excess of ammonia before addition of ammonium ...
Strona 18
... acid . Phosphates and carbonates being objectionable , require this treatment also , whereas material fre from these may be extracted directly with ammoniacal ammonium acetate ( cold if starch is present ) , thus greatly shortening the ...
... acid . Phosphates and carbonates being objectionable , require this treatment also , whereas material fre from these may be extracted directly with ammoniacal ammonium acetate ( cold if starch is present ) , thus greatly shortening the ...
Strona 19
... acid to ammonium hydroxide ( sp . gr . 1.90 ) until neutral , then add 50 ammonium hydroxide in excess for each litre of solution . cc . Sulphuric Acid . - Alcohol Mixture . - To 500 cc . of water add 50 cc . of strong sul- phuric acid ...
... acid to ammonium hydroxide ( sp . gr . 1.90 ) until neutral , then add 50 ammonium hydroxide in excess for each litre of solution . cc . Sulphuric Acid . - Alcohol Mixture . - To 500 cc . of water add 50 cc . of strong sul- phuric acid ...
Strona 20
... acid treatment . The presence of lead in the final solution containing lead would offer no difficulty , however ... acid required and greater danger of loss by expansion of the be material . Ten grams of starch readily oxidised by fifty ...
... acid treatment . The presence of lead in the final solution containing lead would offer no difficulty , however ... acid required and greater danger of loss by expansion of the be material . Ten grams of starch readily oxidised by fifty ...
Strona 21
... acid . This oxidation product is unstable , whereas the oxidation product obtained by the present author is rather stable , even in the dry con- dition . The oxidation process is represented by : - Publisher's Announcements . The ...
... acid . This oxidation product is unstable , whereas the oxidation product obtained by the present author is rather stable , even in the dry con- dition . The oxidation process is represented by : - Publisher's Announcements . The ...
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