Chemical News and Journal of Industrial Science, Tom 145,Wydanie 3779Chemical news office., 1932 |
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Strona 164
... Cool the solution and saturate with hydrogen 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 ...
... Cool the solution and saturate with hydrogen 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 ...
Strona 165
... Cool the solution and make it alkaline with ammonium hydroxide . Add a solution of calcium nitrate until precipitation is com- plete . Filter , wash the residue with water , and add the first washing to the filtrate . The residue ...
... Cool the solution and make it alkaline with ammonium hydroxide . Add a solution of calcium nitrate until precipitation is com- plete . Filter , wash the residue with water , and add the first washing to the filtrate . The residue ...
Strona 168
... Cool and pour into 15 cc . of water ; and then boil for one minute to expel carbon monoxide and sulphur dioxide . Again cool and add 0.5 grams of potassium permanganate crystals . Place the solution in a small Erlenmeyer flask . The ...
... Cool and pour into 15 cc . of water ; and then boil for one minute to expel carbon monoxide and sulphur dioxide . Again cool and add 0.5 grams of potassium permanganate crystals . Place the solution in a small Erlenmeyer flask . 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