Chemical News and Journal of Industrial Science, Tom 145,Wydanie 3779Chemical news office., 1932 |
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Strona 162
... cyanide is removed by the addition of Zn ++ in an acid solution , and sulphide is removed as zinc sulphide in an alkaline solution . The other ions of group two are then precipit- ated as silver salts in the presence of nitric acid ...
... cyanide is removed by the addition of Zn ++ in an acid solution , and sulphide is removed as zinc sulphide in an alkaline solution . The other ions of group two are then precipit- ated as silver salts in the presence of nitric acid ...
Strona 164
... cyanide indicates the presence of ferro- cyanide ion . 4. Detection of Arsenite . Place 20 cc . of the filtrate from ( 2 ) in a precipitation flask and add 4 cc . of dilute hydrocloric acid . Cool the solution and saturate with hydrogen ...
... cyanide indicates the presence of ferro- cyanide ion . 4. Detection of Arsenite . Place 20 cc . of the filtrate from ( 2 ) in a precipitation flask and add 4 cc . of dilute hydrocloric acid . Cool the solution and saturate with hydrogen ...
Strona 167
... cyanide . Save 6. Detection of Cyanide . Saturate the filtrate from ( 5 ) with hydrogen sulphide until all of the silver and mercuric ions are precipitated as the sulphide . Test for com- plete precipitation after filtering . Make the ...
... cyanide . Save 6. Detection of Cyanide . Saturate the filtrate from ( 5 ) with hydrogen sulphide until all of the silver and mercuric ions are precipitated as the sulphide . Test for com- plete precipitation after filtering . Make the ...
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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