Chemical News and Journal of Industrial Science, Tomy 101-102Chemical news office., 1910 |
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Strona 16
... possible . The precipitate was washed with cold dilute sulphurous acid till the filtrate gave no yellow coloration with hydrogen peroxide . The precipitate when treated with sulphuric acid + hydrogen peroxide gave a distinct yellow ...
... possible . The precipitate was washed with cold dilute sulphurous acid till the filtrate gave no yellow coloration with hydrogen peroxide . The precipitate when treated with sulphuric acid + hydrogen peroxide gave a distinct yellow ...
Strona 18
... possible ; loosen stopper but let current of CO2 continue , add cautiously some starch solution and titrate with N / 10 iodine . It is necessary to absolutely exclude air , and to standardise the iodine solution with pure tin . Results ...
... possible ; loosen stopper but let current of CO2 continue , add cautiously some starch solution and titrate with N / 10 iodine . It is necessary to absolutely exclude air , and to standardise the iodine solution with pure tin . Results ...
Strona 19
... possible reducing agent . Its extreme cheapness makes it all the more desirable . An objection to its use arises at once in the fact that a temperature of at least 1200 ° C. is required to practically reduce zinc oxide to metallic zinc ...
... possible reducing agent . Its extreme cheapness makes it all the more desirable . An objection to its use arises at once in the fact that a temperature of at least 1200 ° C. is required to practically reduce zinc oxide to metallic zinc ...
Strona 30
... possible . 1. Magnesium Sulphate . The unground crystals . After two hours grinding Removed by the grinding Water ( per cent ) . ... 51.85 43 ° 30 .. 2:55 In the process of grinding the substance at first seemed moist and sticky , and ...
... possible . 1. Magnesium Sulphate . The unground crystals . After two hours grinding Removed by the grinding Water ( per cent ) . ... 51.85 43 ° 30 .. 2:55 In the process of grinding the substance at first seemed moist and sticky , and ...
Strona 32
... possible the same conditions , a series of five tubes of the sample containing varying amounts of moisture being used for each test , and the minimum test of each series noted . A new lot of paper is usually tested within one week after ...
... possible the same conditions , a series of five tubes of the sample containing varying amounts of moisture being used for each test , and the minimum test of each series noted . A new lot of paper is usually tested within one week after ...
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acetic acid action alcohol alkaline aluminium ammonia ammonium amount analysis apparatus atomic weight B.Sc barium boiling bromide calcium calculated carbon dioxide cent Chem chemical Chemistry chemists chloride colour comet compounds concentrated condensation containing copper crystalline D.Sc decomposed derivatives determination dilute dissolved distilled ether ethyl evaporated excess experiments filter filtrate flask formed formula gives gold grms heated hydrochloric acid hydrogen hydroxide invertase iodide iodine iron J. J. Thomson ketone liquid melting metal method mgrms mineral mixture molecular molecules muriatic niobic nitrate nitric acid obtained oxide oxidised oxygen paper perchloric acid permanganate phosphorus platinum potassium precipitate prepared present Prof pure quantity reaction reduced residue salt sample scandium silver phosphate Society sodium sodium carbonate soluble substance sugar sulphate sulphide sulphuric acid tantalic acid tantalum telluride tellurium temperature theory tion titanic acid titanium tube vanadium vapour washed ytterbium zinc