Chemical News and Journal of Industrial Science, Tomy 105-106Chemical news office., 1912 |
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Strona 15
... lead plaster , wool fat , and yellow wax . about 3 grms . of the plaster mass , accurately weighed , with 20 cc . of nitric acid , sp . gr . 1.38 to 1 · 40 , in a flask having a wide neck and connected with a reflux condenser . Heat ...
... lead plaster , wool fat , and yellow wax . about 3 grms . of the plaster mass , accurately weighed , with 20 cc . of nitric acid , sp . gr . 1.38 to 1 · 40 , in a flask having a wide neck and connected with a reflux condenser . Heat ...
Strona 29
... lead , and zinc , whose values may be said to be well fixed by occurrence and costs of production , we soon reach other metals , for which a new demand might well greatly reduce the cost . Among these are many whose ores occur in ...
... lead , and zinc , whose values may be said to be well fixed by occurrence and costs of production , we soon reach other metals , for which a new demand might well greatly reduce the cost . Among these are many whose ores occur in ...
Strona 30
... lead floats on an alloy made up of lead carrying a few per cent of dissolved zinc . In general , the quantity of the one metal dissolved and held in solution by the other depends on the temperature , and the higher the temperature the ...
... lead floats on an alloy made up of lead carrying a few per cent of dissolved zinc . In general , the quantity of the one metal dissolved and held in solution by the other depends on the temperature , and the higher the temperature the ...
Strona 32
... lead acetate added . This gave a yellow precipitate , which was sepa- | rated by filtration , washed with alcohol , suspended in alcohol , and treated with hydrogen sulphide . After separation from the lead sulphide the alcoholic ...
... lead acetate added . This gave a yellow precipitate , which was sepa- | rated by filtration , washed with alcohol , suspended in alcohol , and treated with hydrogen sulphide . After separation from the lead sulphide the alcoholic ...
Strona 34
... lead precipitate of paraffinic acid obtained in the isolation of this body in the manner described in previous pages is freed from lead by hydrogen sulphide and the alcohol evaporated , there is left an orange - coloured oil which ...
... lead precipitate of paraffinic acid obtained in the isolation of this body in the manner described in previous pages is freed from lead by hydrogen sulphide and the alcohol evaporated , there is left an orange - coloured oil which ...
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