 | George Fownes - 1845 - عدد الصفحات: 498
...platinum-black, where the division is pushed much further. It is easily prepared by slowly heating to 212°, with frequent agitation, a solution of chloride of...soda and a quantity of sugar have been added. The black powder is collected on a filter, washed and dried by gentle heat This substance appears to possess... | |
 | George Fownes - 1850 - عدد الصفحات: 524
...that of platinum-black, where the division is pushed much further. It is easily prepared by boiling a solution of chloride of platinum to which an excess...carbonate of soda and a quantity of sugar have been added, until the precipitate formed, after a little time, becomes perfectly black, and the supernatant liquid... | |
 | John William Draper - 1852 - عدد الصفحات: 432
...of crucibles, tubes, wire, foil, &c. Platinum Black is prepared by slow- "=—;_ ly heating to 212° a solution of chloride of platinum, to which an excess of carbonate of soda and some sugar have been added. It is a dark powder, and possesses the property of determining a variety... | |
 | George Fownes - 1855 - عدد الصفحات: 582
...where the division is pushed much farther. It is easily prepared by boiling a solution of bichloride of platinum to which an excess of carbonate of soda and a quantity of sugar have been added, until the precipitate formed after a little time becomes perfectly black, and the supernatant liquid... | |
 | George Fownes - 1855 - عدد الصفحات: 580
...where the division is pushed much farther. It is easily prepared by boiling a solution of bichloride of platinum to which an excess of carbonate of soda and a quanhty of sugar have been added, until the precipitate formed after a little time becomes perfectly... | |
 | George Fownes - 1857 - عدد الصفحات: 576
...where the division is pushed much farther. It is easily prepared by boiling a solution of bichloride of platinum to which an excess of carbonate of soda and a quantity of sugar have been added, until the precipitate formed after a little time becomes perfectly black, and the supernatant liquid... | |
 | George Fownes - 1859 - عدد الصفحات: 600
...where the division is pushed much farther. It is easily prepared by boiling a solution or bichloride of platinum, to which an excess of carbonate of soda and a quantity Of sugar have been added, until the precipitate formed after a little time becomes perfectly black, and the supernatant liquid... | |
 | David Ames Wells - 1859 - عدد الصفحات: 524
...welded and rolled into bars or sheets. The working of it was formerly confined wholly to France, but within a few years past it has been introduced somewhat...ether (§ 469). 659. Platinum forms two oxyds, PtO and Pt02, and two chlorides, PtOl and PtCls. The last named compound, the bi-chloride of platinum, is the... | |
 | David Ames Wells - 1859 - عدد الصفحات: 528
...Platinum exists in two states of minute subdivision, riz., as spongy platinum, and platinum blade. The properties and preparation of spongy platinum...ether (§ 469). 659. Platinum forms two oxyds, PtO and PtOs, and two chlorides, PtCl and PtCU. The last named compound, the bi-chloride of platinum, is the... | |
 | David Ames Wells - 1860 - عدد الصفحات: 528
...Platinum exists in two states of minute subdivision, viz., as spongy platinum, ana platinum blade. The properties and preparation of spongy platinum...spongy platinum, of condensing gases, and oxydizing alcohel and ether (§469). 659. Platinum forms two oxyds, PtO and Pt02, and two chlorides, PtCl and... | |
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The working of it was formerly confined wholly to France, but within a few years past it has been introduced somewhat extensively as a business in this country. Platinum exists in two states of minute subdivision, viz., as spongy platinum, and platinum... 
