Chemical News and Journal of Industrial Science, Tom 145,Wydanie 3779Chemical news office., 1932 |
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Strona 164
... 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 sulphur and arsenious sulphide will form . If no precipitate forms , however ...
... 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 sulphur and arsenious sulphide will form . If no precipitate forms , however ...
Strona 165
... present . Thiosulphates , like sulphites , yield sulphur dioxide , when acidified with acetic acid , and the regular procedure provides no means of determining the source of the sulphur dioxide . 10. To the residue from ( 8 ) add 25 cc ...
... present . Thiosulphates , like sulphites , yield sulphur dioxide , when acidified with acetic acid , and the regular procedure provides no means of determining the source of the sulphur dioxide . 10. To the residue from ( 8 ) add 25 cc ...
Strona 168
... present , the solution first turns black ; finally , a black precipitate forms . Concentrated sulphuric acid is added to destroy thiocyanate and formate . These must be destroyed without boiling the solu- tion to avoid loss of hydrogen ...
... present , the solution first turns black ; finally , a black precipitate forms . Concentrated sulphuric acid is added to destroy thiocyanate and formate . These must be destroyed without boiling the solu- tion to avoid loss of hydrogen ...
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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