Chemical News and Journal of Industrial Science, Tom 145,Wydanie 3779Chemical news office., 1932 |
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Strona 164
... sulphide . A yellow precipitate of arsenious sulphide is formed if arsenite is present . If arsenite is absent and no precipitate forms , heat the solution to boiling ; if arsen- ate is present , a yellow precipitate consist- ing of ...
... sulphide . A yellow precipitate of arsenious sulphide is formed if arsenite is present . If arsenite is absent and no precipitate forms , heat the solution to boiling ; if arsen- ate is present , a yellow precipitate consist- ing of ...
Strona 165
... sulphide Yellow arsenic sulphide precipitates it arsenate is present . 16. Detection of Phosphate . If ferro- cyanide was not detected in ( 3 ) , add 5 cc . of concentrated nitric acid to the second half of the filtrate from ( 8 ) ...
... sulphide Yellow arsenic sulphide precipitates it arsenate is present . 16. Detection of Phosphate . If ferro- cyanide was not detected in ( 3 ) , add 5 cc . of concentrated nitric acid to the second half of the filtrate from ( 8 ) ...
Strona 167
... Sulphide . To the filtrate from step ( 1 ) , add dilute ammonium hydroxide until the solution is just alkaline , and then add 10 cc . in excess . Zinc sulphide is precipitated . Filter and wash the residue with water , discarding all ...
... Sulphide . To the filtrate from step ( 1 ) , add dilute ammonium hydroxide until the solution is just alkaline , and then add 10 cc . in excess . Zinc sulphide is precipitated . Filter and wash the residue with water , discarding all ...
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acetic acid acetone add 10 cc added addition alkaline alloys ammonium hydroxide analysis anions annealing arsenate arsenite barium and calcium barium nitrate boiling borate calcium nitrates carbonate Chem Chemical chloride chromate colour complete consisting containing Cool crystals cyanide Detection determine dilute discard dissolve distortion drops effect excess fatigue ferric ferrocyanide Filter filtrate flask fluoride followed formate forms give grams heat Heavy hydrogen hydroxide increase indicates insoluble Institution ions lead Lecture London material Mechanical metals methods minutes mixture moulds nickel obtained oxalate Patent phosphate plant portion potassium precipitate precipitate forms precipitation is complete present produced published reduction removed salts saturated Save Sensitivity Separation September shown silver Slight sodium soluble solution solution containing step studied Sub-Group sufficiently sulphide sulphuric acid tartrate temperature test tube thiocyanate thiosulphate tion various volume Wash the residue white precipitate wire Yellow