Chemical News and Journal of Industrial Science, Tomy 103-104Chemical news office., 1911 |
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Strona 16
... dissolved in water made strongly alkaline with caustic soda solution until the precipitate first formed had re - dissolved ( 8 grms . NaOH ) , and then acid again with citric acid ( 15 grms . ) . The following additional remarks may be ...
... dissolved in water made strongly alkaline with caustic soda solution until the precipitate first formed had re - dissolved ( 8 grms . NaOH ) , and then acid again with citric acid ( 15 grms . ) . The following additional remarks may be ...
Strona 28
... dissolved in water , and the enamel pieces col- lected on a filter - paper . Some obstinate enamels require painstaking methods , such as chipping off with a chisel and separating the different coats - which always vary somewhat in ...
... dissolved in water , and the enamel pieces col- lected on a filter - paper . Some obstinate enamels require painstaking methods , such as chipping off with a chisel and separating the different coats - which always vary somewhat in ...
Strona 30
... dissolved in aqua regia , and evaporated with hydrochloric acid ; the platinum - and copper , if any is present - are thrown down by heating and passing in hydrogen sulphide . The filtrate from the platinum and copper is made ammoniacal ...
... dissolved in aqua regia , and evaporated with hydrochloric acid ; the platinum - and copper , if any is present - are thrown down by heating and passing in hydrogen sulphide . The filtrate from the platinum and copper is made ammoniacal ...
Strona 42
... dissolved in nitric acid , and again fused . The filtrate filtrate ( fraction I ) nitrates precipitate ( fraction II ) Ist series ' filtrate ppt . filtrate Ppt 2d series filtrate ppt . filtrate ppt filtrate ppt . 3d series Y , O , Er ...
... dissolved in nitric acid , and again fused . The filtrate filtrate ( fraction I ) nitrates precipitate ( fraction II ) Ist series ' filtrate ppt . filtrate Ppt 2d series filtrate ppt . filtrate ppt filtrate ppt . 3d series Y , O , Er ...
Strona 53
... dissolved in 200 cc . of hot water in a platinum dish , adding a little hydrofluoric acid to obtain a clear solution . The solution was made alkaline with ammonia , and after allowing the precipitate to settle , filtered on a rubber ...
... dissolved in 200 cc . of hot water in a platinum dish , adding a little hydrofluoric acid to obtain a clear solution . The solution was made alkaline with ammonia , and after allowing the precipitate to settle , filtered on a rubber ...
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